Riley Cornelio

Organization Prospect Rankings

• 
  Ranked Washington Nationals #25 prospect in 2026
  BA Grade/Risk: 40/Average
  
  Adjusted Grade: 30
  
  Track Record: Cornelio played high school ball in Colorado before spending three years at Texas Christian. His lone full year in the rotation was 2022, when he led the Horned Frogs in strikeouts. The Nationals drafted Cornelio in the seventh round in 2022, and he plodded through the Class A levels in 2023 and 2024 with high walk rates and bloated ERAs. He reversed course in 2025, finishing second in the system with both 135 strikeouts and 134.1 innings, mostly at Double-A Harrisburg. He reached Triple-A, won the organization’s pitcher of the year award and was added to the 40-man roster in November.
  
  Scouting Report: Cornelio threw nearly 3 mph harder in 2025 than he had the year before, helping to key his breakthrough to the upper levels. He pitched at 94 mph in 2025 and topped out at 98, the result of tweaking his delivery and getting more of his body into his delivery. His four-seamer features riding and running action. Cornelio tightened his mid-80s slider and threw more strikes with it. It’s his go-to secondary pitch with cutter action that hitters don’t see well. His mid-80s changeup flashes average and helps him compete versus lefthanded hitters. Cornelio is an extreme flyball pitcher with fringy control, and advanced hitters will make him pay when he misses spots.
  
  The Future: Cornelio could be a late-bloomer with future swingman or bullpen value, perhaps along the lines of what Brad Lord contributed as a rookie in 2025.
  
  Scouting Grades: Fastball: 55 | Slider: 55 | Changeup: 45 | Control: 45

Draft Prospects

• Ranked #295 prospect in 2022 draft
  School: Texas Christian Committed/Drafted: Never Drafted
  Age At Draft: 22.1
  Cornelio was the primary workhorse for the Horned Frogs this spring. The redshirt sophomore logged 75 innings in 15 starts and found consistency with his pitches that was not always there in past years. The 6-foot-3, 195-pound righty has a firm 92-95 mph sinking fastball to go with an array of offspeed pitches that he competes with. His top weapon is his slider. The sinker/slider combination has long been a devastating 1-2 punch in baseball and it’s no different for Cornelio. The 84-86 mph slider is a pitch that will flash plus and serve as a knockout punch in two-strike counts. His changeup, in the same 84-86 mph range, has downward tumbling action that induces swing and miss as well. Cornelio has the ability to mix in a true 12-to-6 curveball used mostly as a strike one or middle-of-the-count offering, showing the batter something different.
• Ranked #69 prospect in 2019 draft
  The top Colorado prospect in the 2019 class, Cornelio is a 6-foot-3, 193-pound righthander with solid stuff who uses a lively arm and up-tempo delivery to frustrate hitters. Cornelio's pitch mix starts with a low-90s fastball that features natural sink and arm-side run. Over the summer, Cornelio mainly threw only one breaking ball, but he recently added a distinct second breaking pitch. His 78-82 mph slider is his better offering currently, but both his slider and curveball have a chance to be average offerings if he can more consistently get on top of the ball. He also throws an 82-85 mph changeup that has solid tumble and is thrown with good arm speed. Cornelio's delivery is unorthodox and has plenty of moving pieces, which could be a cause for concern, but it also adds to his deception. He throws from a three-quarter arm slot, but he has a stabbing action in the back of his arm stroke and a pronounced head whack as he delivers to the plate, as well as a sharp recoil in his finish as he falls off to the first-base side of the rubber. All of these moving parts lead Cornelio to get out of sync at times, and his release point is scattered as a result. This negatively impacts his control, but his strike-throwing ability is still solid because of his athleticism. There could be plenty more to unlock with Cornelio as he refines his delivery and continues to fill out. He is committed to Texas Christian.

• December, 2018 Scouting Report
  The top Colorado prospect in the 2019 class, Cornelio is a 6-foot-3, 193-pound righthander with solid stuff who uses a lively arm and up-tempo delivery to frustrate hitters. Cornelio's pitch mix starts with a low-90s fastball that features natural sink and arm-side run. Over the summer, Cornelio mainly threw only one breaking ball, but he recently added a distinct second breaking pitch. His 78-82 mph slider is his better offering currently, but both his slider and curveball have a chance to be average offerings if he can more consistently get on top of the ball. He also throws an 82-85 mph changeup that has solid tumble and is thrown with good arm speed. Cornelio's delivery is unorthodox and has plenty of moving pieces, which could be a cause for concern, but it also adds to his deception. He throws from a three-quarter arm slot, but he has a stabbing action in the back of his arm stroke and a pronounced head whack as he delivers to the plate, as well as a sharp recoil in his finish as he falls off to the first-base side of the rubber. All of these moving parts lead Cornelio to get out of sync at times, and his release point is scattered as a result. This negatively impacts his control, but his strike-throwing ability is still solid because of his athleticism. There could be plenty more to unlock with Cornelio as he refines his delivery and continues to fill out. He is committed to Texas Christian.