Danny Duffy Stats & Scouting Report

IP	1,172.0
ERA	3.95
WHIP	1.317
BB/9	3.3
SO/9	8.0

Full name Daniel Richard Duffy
Born 12/21/1988 in Goleta, CA
Profile Ht.: 6'3" / Wt.: 205 / Bats: L / Throws: L
School Cabrillo
Debut 05/18/2011
Drafted in the 3rd round (96th overall) by the Kansas City Royals in 2007 (signed for $365,000).

View Draft Report

Lompoc, midway between San Francisco and Los Angeles on California's Central Coast, is best known for its prison and its proximity to Vandenberg Air Force Base, where the Defense Department tests missiles and launches satellites into space. It has never been a baseball hotbed, but Duffy has attracted scouts by the dozen for his starts this year, dominating with an unrefined but powerful repertoire. He has perhaps the best fastball in the state among draft-eligible players, reaching 95 mph and sitting in the 90-93 mph range with his four-seamer. He's somewhat mature in build and has had back issues in his past, and needs to get stronger. Duffy also throws a high-80s two-seamer with good armside run, and has shown ability with both a slider and curveball. His mechanics aren't a thing of beauty, one easy indicator of how much work he has to do. He doesn't command the strike zone or throw a changeup, and he hasn't maintained his velocity deep into games either. Nevertheless, he's a lefty with power stuff who has dominated inferior competition.

Top Rankings

Organization Prospect Rankings

After posting a 2.49 ERA in three pro seasons and pitching in the Futures Game in 2009, Duffy surprisingly walked away from the game during spring training in 2010. He had a minor elbow injury that would have sidelined him in April, but he says that wasn't an issue. He returned in June and looked as good as ever, touching 95-97 mph regularly throughout the summer. Duffy often paces himself in the early innings, sitting at 90-92 mph before reaching the mid-90s later in games. His velocity jump sometimes comes with a propensity to overthrow. He generally commands his fastball well and creates deception with a crossfire delivery, though he has gotten better about staying online to the plate. His best secondary pitch is a changeup that's slightly above-average at times, but his feel for it wavers. His slow curveball has plenty of depth, but he'll probably switch to a slider that will be a better fit for his three-quarters arm slot. He has a relatively advanced feel for setting up hitters. Though Duffy has made just seven starts above Class A, he's not that far away from the big leagues. He'll return to Double-A to open 2011 and could reach Kansas City by September.
In a system filled with pitching prospects, Duffy had the best season--while posting the worst numbers of his young career. He led Royals farmhands with a 2.98 ERA, finished second with 125 strikeouts and earned spots in the Futures Game and Carolina- California League all-star game. He's now 19-10, 2.49 with 290 strikeouts in 246 pro innings. Duffy's solid stuff plays up because he does a good job of messing with hitters' timing. His 88-92 mph fastball has good downward plane and seems to get in on opponents before they expect it, while his slow, big-breaking curveball keeps them off fastball. He's not afraid to pitch inside. He improved his delivery by shortening his stride. Duffy's changeup got better last year, but he still hasn't fully embraced it. While most pitchers have to learn to pitch in to hitters, he's learning the effectiveness of a down-and-away changeup. His delivery is less than ideal because he throws across his body and his bottom half isn't always in sync with his upper half. The Royals are working on keeping him centered over the rubber longer. He sometimes struggles to put bad starts behind him. Though he'll pitch the entire 2010 season at age 21, Duffy isn't that far away from the majors. One of the last remaining tests for the potential No. 3 starter is finding out how he handles adversity--because he hasn't encountered any.
Duffy has come a long way since he was a 5-foot-4 high school freshman with a 70- mph fastball. He has dominated the lower levels of the minors, going 10-7, 1.97 with 165 strikeouts in 119 innings. The Royals shut him down in late August because of shoulder discomfort, but he could have pitched in the Midwest League playoffs if they hadn't played it safe. Duffy has a nice fastball for a lefty, sitting at 88-92 mph and touching 94. At times, his curveball is a plus pitch and his changeup rates as slightly above average. He has good mound presence and challenges hitters, throwing strikes and keeping the ball down in the zone. He has shortened his stride since turning pro, allowing him to throw on more of a downhill plane, and he also has fixed a tendency to throw across his body. Like many young pitchers, Duffy is prone to overthrowing when he gets into a jam, costing him command. He'll also get cute and lob up an 85-86 mph fastball at times. He rarely has feel for both of his secondary pitches on the same day, and his curve can get loopy. The Royals haven't had a pair of potential frontline lefties like Mike Montgomery and Duffy in years. With his three-pitch mix and maturity, there's no reason Duffy shouldn't continue to succeed in high Class A in 2009.
After signing for $365,000 as a third-round pick in June, Duffy couldn't have been more dominant in the Rookie-level Arizona League. He struck out 15.2 batters per nine innings, posted a 1.45 ERA and went 37 innings without allowing a homer. Duffy already has an 89-92 mph fastball that tops out at 95, and he should add more velocity as he develops physically and fills out his frame. His curveball has the potential to give him a second plus pitch, while his slider can become solid-average. He hides the ball well in his delivery. Duffy's mechanics are extremely raw and hamper his command. He struggles at times to get extension in his delivery and to repeat his arm slot. He also has a tendency to rush toward the plate. His curveball remains inconsistent, and he doesn't have much of a changeup. Duffy should fit in the middle of a major league rotation, though not any time soon. He could open the season in low Class A but will be held back in extended spring training if he struggles in minor league camp.

Minor League Top Prospects

After posting a 1.97 ERA in his first two pro seasons, Duffy took a big step forward this year in learning to be more economical with his pitches. Rather than trying to make a perfect pitch every time, he pounded the strike zone more efficiently, keeping his pitch counts down and allowing him to work deeper into games. Duffy's fastball has some life, sits in the low 90s and touches 93 mph in the early innings. Later in the game, he'll settle into the 88-92 range. His big-breaking 12-to-6 curveball is an occasional plus pitch that tops out in the mid-70s. He has made progress with his changeup, which is now an average offering with screwball-like action. "I liked the three-pitch mix," an AL scout said, "especially if he can consistently run the fastball into the low-90s." Duffy throws slightly across his body, which puts some excess stress on his arm but also adds some deception that allows his fastball to sneak up on hitters. There's some funkiness in his lower half that occasionally hinders his ability to repeat his delivery, but overall he's relatively solid mechanically, throws strikes and has clean arm action.
Duffy flew somewhat under the radar because he got hit hard in his first three starts after arriving from extended spring training in mid-May, and he missed Burlington's postseason run after getting shut down with mild shoulder discomfort in late August. In between, the 19-year-old was as dominant as any MWL starter, going 8-2, 1.16 with 84 strikeouts in 70 innings. He permitted only one earned run over his final six starts, which included the first six innings of a combined no-hitter against Peoria. Duffy has very good stuff for a young lefthander. His fastball ranges from 88-93 mph, his curveball has the makings of a plus pitch and his changeup showed improvement in his first full pro season. He has plenty of poise, showing no fear of challenging hitters.
Duffy had the best pro debut of any young pitcher in the league, striking out 15.2 batters per nine innings and going 37 innings without allowing a home run. He did it mostly by working off his fastball. The Royals precluded Duffy from throwing his two-seam sinker and his slider, preferring for him to focus on improving the command of his four-seamer and curveball and using his changeup. The Royals also worked on making Duffy's mechanics more consistent and keeping him from rushing through his delivery. He made progress on all fronts. His fastball sits at 88-92 mph and touches 94, and his curveball at times is a plus pitch. "He got better at repeating his mechanics and maintaining his stuff late in games as the year went on," Royals pitching coach Mark Davis said. "His fastball was firm and live, and he really located down and away well."

Top 100 Rankings

Best Tools List

Rated Best Changeup in the Carolina League in 2009

Career Transactions

LHP Danny Duffy assigned to Cangrejeros de Santurce.
Round Rock Express released LHP Danny Duffy.
LHP Danny Duffy roster status changed by Texas Rangers.
Texas Rangers signed free agent LHP Danny Duffy to a minor league contract and invited him to spring training.
Texas Rangers invited non-roster LHP Danny Duffy to spring training.
LHP Danny Duffy assigned to Round Rock Express.
LHP Danny Duffy assigned to Cangrejeros de Santurce.
LHP Danny Duffy elected free agency.
LHP Danny Duffy assigned to Frisco RoughRiders from Round Rock Express.
LHP Danny Duffy assigned to Frisco RoughRiders from Round Rock Express.
LHP Danny Duffy assigned to Round Rock Express from Frisco RoughRiders.
LHP Danny Duffy assigned to Round Rock Express from Frisco RoughRiders.
Frisco RoughRiders activated LHP Danny Duffy from the temporarily inactive list.
Frisco RoughRiders placed LHP Danny Duffy on the temporarily inactive list.
LHP Danny Duffy assigned to Frisco RoughRiders from Round Rock Express.
LHP Danny Duffy assigned to Frisco RoughRiders from Round Rock Express.
Round Rock Express placed LHP Danny Duffy on the 7-day injured list.
Texas Rangers signed free agent LHP Danny Duffy to a minor league contract and invited him to spring training.
LHP Danny Duffy assigned to Round Rock Express.
Round Rock Express activated LHP Danny Duffy.
LHP Danny Duffy roster status changed by Texas Rangers.
Round Rock Express activated LHP Danny Duffy.
LHP Danny Duffy elected free agency.
Los Angeles Dodgers sent LHP Danny Duffy on a rehab assignment to Oklahoma City Dodgers.
Los Angeles Dodgers sent LHP Danny Duffy on a rehab assignment to Oklahoma City Dodgers.
Los Angeles Dodgers sent LHP Danny Duffy on a rehab assignment to Rancho Cucamonga Quakes.
Los Angeles Dodgers sent LHP Danny Duffy on a rehab assignment to Rancho Cucamonga Quakes.
Los Angeles Dodgers sent LHP Danny Duffy on a rehab assignment to ACL Dodgers.
Los Angeles Dodgers sent LHP Danny Duffy on a rehab assignment to ACL Dodgers.
Los Angeles Dodgers placed LHP Danny Duffy on the 60-day injured list.
Los Angeles Dodgers placed LHP Danny Duffy on the 60-day injured list.
Los Angeles Dodgers placed LHP Danny Duffy on the 60-day injured list.
Los Angeles Dodgers activated LHP Danny Duffy.
Los Angeles Dodgers signed free agent LHP Danny Duffy.
Los Angeles Dodgers activated LHP Danny Duffy.
LHP Danny Duffy elected free agency.
Los Angeles Dodgers placed LHP Danny Duffy on the 60-day injured list. Left flexor strain.
Kansas City Royals traded LHP Danny Duffy and cash to Los Angeles Dodgers for Player To Be Named Later.
Kansas City Royals placed LHP Danny Duffy on the 10-day injured list. Left flexor strain.
Kansas City Royals activated LHP Danny Duffy from the 10-day injured list.
Kansas City Royals placed LHP Danny Duffy on the 10-day injured list. Left forearm flexor strain.
P Danny Duffy changed number to 30.
Danny Duffy changed number to 21.
P Danny Duffy changed number to 42.
Kansas City Royals activated LHP Danny Duffy from the 10-day injured list.
Kansas City Royals sent LHP Danny Duffy on a rehab assignment to Northwest Arkansas Naturals.
Kansas City Royals placed LHP Danny Duffy on the 10-day injured list retroactive to August 4, 2019. Left hamstring strain.
Kansas City Royals activated LHP Danny Duffy from the 10-day injured list.
Kansas City Royals sent LHP Danny Duffy on a rehab assignment to Northwest Arkansas Naturals.
Kansas City Royals placed LHP Danny Duffy on the 10-day injured list retroactive to March 25, 2019. Left shoulder impingement syndrome.
Kansas City Royals activated LHP Danny Duffy from the 10-day injured list.
Kansas City Royals placed LHP Danny Duffy on the 10-day disabled list. Left shoulder impingement.
Kansas City Royals activated LHP Danny Duffy from the 10-day disabled list.
Kansas City Royals placed LHP Danny Duffy on the 10-day disabled list. Left elbow impingement/valgus extension overload.
Kansas City Royals activated LHP Danny Duffy.
Kansas City Royals sent LHP Danny Duffy on a rehab assignment to Omaha Storm Chasers.
sent LHP Danny Duffy on a rehab assignment to Omaha Storm Chasers.
Kansas City Royals placed LHP Danny Duffy on the 10-day disabled list retroactive to May 29, 2017. Strained right oblique.
United States activated LHP Danny Duffy.
Kansas City Royals activated LHP Danny Duffy from the 15-day disabled list.
Kansas City Royals sent LHP Danny Duffy on a rehab assignment to Omaha Storm Chasers.
Kansas City Royals placed LHP Danny Duffy on the 15-day disabled list retroactive to May 17, 2015. Left biceps tendinitis.
Kansas City Royals recalled LHP Danny Duffy from Omaha Storm Chasers.
Kansas City Royals optioned LHP Danny Duffy to Omaha Storm Chasers.
Danny Duffy roster status changed by Kansas City Royals.
Kansas City Royals placed LHP Danny Duffy on the 15-day disabled list retroactive to September 8, 2013. Mild left flexor strain.
Kansas City Royals recalled LHP Danny Duffy from Omaha Storm Chasers.
Kansas City Royals optioned Danny Duffy to Omaha Storm Chasers.
Kansas City Royals recalled Danny Duffy from Omaha Storm Chasers.
Danny Duffy roster status changed by Kansas City Royals.
Kansas City Royals optioned Danny Duffy to Omaha Storm Chasers.
Kansas City Royals recalled Danny Duffy from Omaha Storm Chasers.
Danny Duffy assigned to Omaha Storm Chasers from Northwest Arkansas Naturals.
Danny Duffy assigned to Northwest Arkansas Naturals from Omaha Storm Chasers.
Kansas City Royals optioned Danny Duffy to Omaha Storm Chasers.
Danny Duffy roster status changed by Kansas City Royals.
Kansas City Royals sent LHP Danny Duffy on a rehab assignment to Omaha Storm Chasers.
Kansas City Royals sent LHP Danny Duffy on a rehab assignment to Northwest Arkansas Naturals.
Kansas City Royals placed LHP Danny Duffy on the 15-day disabled list. Recovering from June 2012 Tommy John surgery.
Kansas City Royals activated LHP Danny Duffy from the 60-day disabled list.
Kansas City Royals transferred LHP Danny Duffy from the 15-day disabled list to the 60-day disabled list.
Kansas City Royals placed LHP Danny Duffy on the 15-day disabled list. Left elbow tightness.
Kansas City Royals recalled Danny Duffy from Omaha Storm Chasers.
Kansas City Royals optioned Danny Duffy to Omaha Storm Chasers.
Kansas City Royals selected the contract of Danny Duffy from Omaha Storm Chasers.
Danny Duffy assigned to Omaha Storm Chasers from Northwest Arkansas Naturals.
Kansas City Royals invited non-roster LHP Danny Duffy to spring training.
Danny Duffy assigned to Surprise Rafters.
Danny Duffy assigned to Northwest Arkansas Naturals from Wilmington Blue Rocks.
Danny Duffy assigned to Wilmington Blue Rocks from Idaho Falls Chukars.
Danny Duffy assigned to Idaho Falls Chukars from AZL Royals.
AZL Royals signed Danny Duffy.
LHP Danny Duffy retired.
LHP Danny Duffy retired.
Kansas City Royals invited non-roster LHP Danny Duffy to spring training.