Scouting Report

Scouting grades: Fastball: 55 | Slider: 50 | Changeup: 50 | Control: 50 | Overall: 50

Born in Safety Harbor, Fla., the same year Joe Maddon was hired to manage Tampa Bay’s Major League team, Harrison spent much of his youth making the short trip to Tropicana Field to watch the Rays play. In 2023, his hometown team drafted him in the fifth round and signed him away from a Florida State commitment for $847,500. Harrison, a high school teammate of Phillies prospect Aidan Miller at Mitchell High, didn’t make his professional debut until last year, but he showed a tremendous amount of potential and a surprising amount of polish for such a young pitcher.

Harrison pitched well in the Florida Complex League to begin his first partial season, recording a 3.58 ERA with 39 strikeouts in 32 2/3 innings. And he finished just as strong, putting together a 3.15 ERA with 48 strikeouts in 40 innings during Single-A Charleston’s postseason push. By some evaluations, the 18-year-old Harrison was the best playoff starter in a rotation that also included Santiago Suarez and Gary Gill Hill.

The 6-foot-4 right-hander’s fastball sat at 94-96 mph in the postseason series and touched 98. His heater averaged 95 mph on the season, and he throws it with impressive life up in the zone. His changeup is already a solid offering and could improve further as a weapon against left-handed hitters. His slider was also an effective secondary pitch, although he did most of his work with his heater. The Rays have credited Harrison for being fearless on the mound and attacking hitters, displaying confidence beyond his years. He’ll need to keep his control in check, as his walk rate ticked up against tougher competition in Single-A, but he has the ability to climb as high as any pitcher in the Rays’ pipeline.

Scouting grades: Fastball: 55 | Curveball: 45 | Slider: 50 | Changeup: 50 | Control: 45 | Overall: 40

Ranked as MLB Pipeline’s No. 245 prospect in the 2023 Draft class, Harrison--– a teammate of Phillies prospect Aidan Miller at Mitchell (FL) High School -- went in the fifth round to the Rays and was signed away from a Florida State commitment for $847,500. Tampa Bay played it slow with him in his first full season -- understandably so since he turned 18 after the Draft -- and Harrison was solid out of the gate with a 3.58 ERA and 39 strikeouts in 32 2/3 innings in the Florida Complex League. He was promoted to Single-A Charleston in early July, two months after his season debut.

Despite his relative youth, the 6-foot-4 right-hander has impressed Rays officials already with a mature and intense approach on the mound as he shows a willingness to go right after hitters. His fastball already runs up to 98, and he’ll typically throw it 93-96 mph with impressive life up in the zone. He already has a quality changeup that could end up above average in time with the way he sells it with arm speed, and Tampa Bay coaches are pleased with how he can use the fading pitch to fend off lefties. He’ll throw a pair of breaking balls with a slider and slurvier curve, but it’s the former that has more potential. 

Keeping everything in control will be worth monitoring for Harrison going forward. He had an impressive walk rate against his peers in the FCL, but that has since crept up with a move to face full-season bats. With his raw ingredients, Harrison has a ceiling as high as anyone in the Rays pipeline, including Gary Gill Hill and Santiago Suarez.

Scouting grades: Fastball: 55 | Slider: 45 | Changeup: 45 | Control: 45 | Overall: 40

As the 2023 spring high school season got underway in Florida, scouts were excited to be able to do some 2-for-1 shopping at Mitchell High School, getting to see one of the best prep bats in the country in Aidan Miller while also being able to evaluate Harrison on the mound. After Miller went down with a broken hamate, Harrison became the main attraction, showing off some stuff now with projectability to keep the industry intrigued. The Rays selected the righty in the fifth round and went above slot to sign him for $847,500.

Harrison has a large, 6-foot-4 frame that has present strength, with room to add and throw harder. He’s already taken a step forward in that regard, showing a fastball in the 92-95 mph range this spring. It’s easy to dream on more consistent velocity as he matures, and the pitch already has good life. His secondary stuff is behind the heater, though both his slider and changeup have the chance to be decent offerings in the future. He’ll need to add some oomph to his slider, thrown around 71-75 mph now with a slurvy look. He hasn’t used his changeup much but has shown decent feel for it.

While Harrison tends to be around the strike zone, his command is also a work in progress. There are definitely some interesting ingredients, and the Rays know to be patient with the local product as he enters pro ball.

Video scouting report »

Scouting grades: Fastball: 55 | Slider: 45 | Changeup: 45 | Control: 45 | Overall: 40

As the 2023 spring high school season got underway in Florida, scouts were excited to be able to do some 2-for-1 shopping at Mitchell High School, getting to see one of the best prep bats in the country in Aidan Miller while also being able to evaluate Harrison on the mound. After Miller went down with a broken hamate, Harrison became the main attraction, showing off some now stuff and projection to keep the industry intrigued.

Harrison has a large, 6-foot-4 frame that has present strength, with room to add and throw harder. He’s already taken a step forward in that regard, showing a fastball in the 92-95 mph range this spring. It’s easy to dream on more consistent velocity as he matures, and the pitch already has good life. His secondary stuff is behind the heater, though both his slider and changeup have the chance to be decent offerings in the future. He’ll need to add some oomph to his slider, thrown around 71-75 mph now with a slurvy look. He hasn’t used his changeup much but has shown decent feel for it.

While Harrison tends to be around the strike zone, his command is also a work in progress. There are definitely some interesting ingredients and a team interested in the Florida State recruit will likely have to be patient in helping him reach his upside potential.

Awards

CAR Pitcher of the Week

Week	Team
06/29/2025

FCL Pitcher of the Week

Week	Team
06/02/2024
05/26/2024

Transactions

Team	Date	Transaction
	08/05/2025	RHP Trevor Harrison assigned to Bowling Green Hot Rods from Charleston RiverDogs.
	08/05/2025	Bowling Green Hot Rods activated RHP Trevor Harrison.
	03/06/2025	activated RHP Trevor Harrison.
	07/04/2024	RHP Trevor Harrison assigned to Charleston RiverDogs from FCL Rays.
	11/14/2023	RHP Trevor Harrison assigned to FCL Rays.
	08/10/2023	RHP Trevor Harrison assigned to Rays Organization.
	07/21/2023	Tampa Bay Rays signed RHP Trevor Harrison.
	06/05/2023	RHP Trevor Harrison assigned to College Workout.
	09/22/2022	RHP Trevor Harrison and assigned to High School Workout.