Drafted in the 27th round (828th overall) by the Arizona Diamondbacks in 2008.
Top Rankings
Organization Prospect Rankings
Cook never posted a sub-5.00 ERA in three seasons at Southern California, but he showed enough promise for the Diamondbacks to give him an $80,000 bonus after they took him in the 27th round of the 2008 draft. He had middling success as a starter in the lower minors before moving to the bullpen and zooming from Double-A to the majors last season, and the A's got him in the December deal that sent Trevor Cahill to Arizona. Cook showed better stuff in shorter stints, though no one expected it to jump as much as it did. He worked with an 89-93 mph fastball as a starter and suddenly had a consistent 95-97 mph heater as a reliever, topping out at 101. His fastball has riding four-seam life. Cook can miss bats with a hard splitter that he throws at 88-91 mph. He also has an 85-88 mph slider with more lateral movement than depth. He can throw the slider for strikes, but he doesn't always command it in the strike zone. Improved overall command is Cook's biggest need. After a taste of the big leagues, he'll contend for a role in Oakland's bullpen.
Best Tools List
Rated Best Reliever in the Southern League in 2011
Career Transactions
Miami Marlins released RHP Ryan Cook.
RHP Ryan Cook assigned to Marlins Alternate Training Site from Wichita Wind Surge.
RHP Ryan Cook assigned to Wichita Wind Surge.
Miami Marlins signed free agent RHP Ryan Cook to a minor league contract and invited him to spring training.
Yomiuri Giants activated RHP Ryan Cook.
RHP Ryan Cook assigned to Yomiuri Giants.
RHP Ryan Cook elected free agency.
Seattle Mariners sent RHP Ryan Cook outright to Tacoma Rainiers.
Seattle Mariners recalled RHP Ryan Cook from Tacoma Rainiers.
Seattle Mariners optioned RHP Ryan Cook to Tacoma Rainiers.
Seattle Mariners selected the contract of Ryan Cook from Tacoma Rainiers.
Seattle Mariners invited non-roster RHP Ryan Cook to spring training.
Tacoma Rainiers activated RHP Ryan Cook from the 7-day disabled list.
Tacoma Rainiers placed RHP Ryan Cook on the 7-day disabled list.
RHP Ryan Cook assigned to Tacoma Rainiers.
Seattle Mariners signed free agent RHP Ryan Cook to a minor league contract.
RHP Ryan Cook elected free agency.
Seattle Mariners sent RHP Ryan Cook outright to Tacoma Rainiers.
Seattle Mariners sent RHP Ryan Cook on a rehab assignment to AZL Mariners.
Seattle Mariners placed RHP Ryan Cook on the 60-day disabled list. strained right latissimus dorsi muscle
Seattle Mariners signed free agent RHP Ryan Cook.
RHP Ryan Cook elected free agency.
Chicago Cubs claimed RHP Ryan Cook off waivers from Boston Red Sox.
Boston Red Sox recalled RHP Ryan Cook from Pawtucket Red Sox.
Boston Red Sox recalled Ryan Cook from Pawtucket Red Sox.
Boston Red Sox optioned RHP Ryan Cook to Pawtucket Red Sox.
Ryan Cook roster status changed by Boston Red Sox.
Boston Red Sox optioned RHP Ryan Cook to Pawtucket Red Sox.
Oakland Athletics traded RHP Ryan Cook to Boston Red Sox for Player To Be Named Later.
Oakland Athletics recalled Ryan Cook from Nashville Sounds.
Oakland Athletics optioned RHP Ryan Cook to Nashville Sounds.
Oakland Athletics optioned RHP Ryan Cook to Nashville Sounds.
Ryan Cook roster status changed by Oakland Athletics.
Oakland Athletics sent RHP Ryan Cook on a rehab assignment to Stockton Ports.
Oakland Athletics placed RHP Ryan Cook on the 15-day disabled list retroactive to May 8, 2014. Right forearm muscle strain.
Oakland Athletics activated RHP Ryan Cook from the 15-day disabled list.
Oakland Athletics sent RHP Ryan Cook on a rehab assignment to Stockton Ports.
Oakland Athletics placed RHP Ryan Cook on the 15-day disabled list retroactive to March 21, 2014. Right shoulder inflammation
Oakland Athletics traded cash, LHP Craig Breslow and RHP Trevor Cahill to Arizona Diamondbacks for RF Collin Cowgill, RHP Jarrod Parker and RHP Ryan Cook.
Ryan Cook roster status changed by Arizona Diamondbacks.
Arizona Diamondbacks reassigned RHP Ryan Cook to the minor leagues.
Arizona Diamondbacks recalled RHP Ryan Cook from Reno Aces.
Arizona Diamondbacks optioned Ryan Cook to Reno Aces.
Ryan Cook roster status changed by Arizona Diamondbacks.
Arizona Diamondbacks recalled Ryan Cook from Reno Aces.
Arizona Diamondbacks optioned Ryan Cook to Reno Aces.
Arizona Diamondbacks selected the contract of Ryan Cook from Mobile BayBears.
Ryan Cook assigned to Mobile BayBears from Visalia Rawhide.
RHP Ryan Cook assigned to Arizona Diamondbacks.
Ryan Cook roster status changed by Visalia Rawhide.
Visalia Rawhide placed RHP Ryan Cook on the 7-day disabled list.
RHP Ryan Cook assigned to Visalia Rawhide from Reno Aces.
RHP Ryan Cook assigned to Reno Aces from Visalia Rawhide.
Ryan Cook assigned to Visalia Rawhide from Yakima Bears.
Ryan Cook assigned to Yakima Bears from South Bend Silver Hawks.
Ryan Cook roster status changed by South Bend Silver Hawks.
South Bend Silver Hawks placed RHP Ryan Cook on the 7-day disabled list. Blister on right hand
Arizona Diamondbacks signed RHP Ryan Cook.
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