Scouting Report

Scouting grades: Hit: 40 | Power: 55 | Run: 30 | Arm: 60 | Field: 55 | Overall: 50

Stevenson’s trajectory has been steady and deliberate. The North Carolina native turned down top-five-round money out of high school in 2023 to attend North Carolina, and he quickly validated that decision by seizing the Tar Heels’ starting catching job as a freshman. That year, he launched 14 homers and earned a spot on the U.S. collegiate national team. His sophomore season only strengthened his profile, as he clubbed 19 homers and emerged as one of the premier catching prospects in the class. The Mariners wound up selecting him with their Competitive Balance Round A pick in 2025 for a $2.8 million bonus. 

A physical, left-handed hitter, Stevenson’s calling card is impact. He consistently produces loud contact and naturally lifts the ball, with power that plays from left-center to the right-field line. There’s legitimate 25-homer potential if the hit tool reaches average. His approach is generally disciplined, but quality velocity and well-located offspeed can expose swing-and-miss tendencies that will need refinement against pro pitching. That said, the Mariners were really encouraged about his first 100 plate appearances at Single-A Modesto, where he had just a 19 percent K rate.

Stevenson won’t wow on the bases -- he’s a well-below-average runner -- but he has reshaped his body and vastly improved his conditioning since high school. Defensively, the strides have been notable. His receiving has cleaned up, and he now projects as a dependable defender. His arm strength stands out, and his throws carry both velocity and accuracy, giving him a chance to control the running game at higher levels. Because he turns 22 in July, Stevenson is already far more seasoned, and as such, could be on a faster trajectory. His upside was one reason why the club was comfortable trading away Harry Ford, its first-round pick in 2021 and a former Top 100 prospect.

Scouting grades: Hit: 40 | Power: 55 | Run: 30 | Arm: 60 | Field: 55 | Overall: 50

Stevenson could have signed for top-five-rounds money as a North Carolina high schooler in 2023. He opted instead to stay local and play for the Tar Heels, claimed North Carolina's starting job as a freshman and slammed 14 homers before playing with the U.S. collegiate national team during the summer. He went deep 19 times this spring as a sophomore and was considered one of the best catching prospects available. Though he came with some questions about his hitting ability after posting a .251 batting average and 24.1 percent strikeout rate as a junior, he still garnered first-round discussion and landed in Competitive Balance Round A, joining the Mariners for $2.8 million.

A physical left-handed hitter, Stevenson has a propensity for hitting balls hard and launching them in the air. His power plays from left-center to the right-field foul pole and could translate into 25 homers per season. He has a reasonably disciplined approach but struggles to make contact against quality fastballs and changeups.

While Stevenson is a well-below-average runner, he has significantly improved his conditioning since high school. He has really cleaned up his receiving and become a solid defender behind the plate. His arm stands out both for pure strength and the accuracy of his throws.

Video scouting report »

Scouting grades: Hit: 40 | Power: 55 | Run: 30 | Arm: 60 | Field: 55 | Overall: 50

Stevenson could have signed for top-five-rounds money as a North Carolina high schooler in 2023. He opted instead to stay local and play for the Tar Heels, claimed North Carolina's starting job as a freshman and slammed 14 homers before playing with the U.S. collegiate national team during the summer. He went deep 19 times this spring as a sophomore and is one of the best catching prospects available, though he comes with some questions about his hitting ability after posting a .251 batting average and 24 percent strikeout rate.

A physical left-handed hitter, Stevenson has a propensity for hitting balls hard and launching them in the air. His power plays from left-center to the right-field foul pole and could translate into 25 homers per season. He has a reasonably disciplined approach but struggles to make contact against quality fastballs and changeups.

While Stevenson is a well-below-average runner, he has significantly improved his conditioning since high school. He has really cleaned up his receiving and become a solid defender behind the plate. His arm stands out both for pure strength and the accuracy of his throws.

Transactions

Team	Date	Transaction
	03/05/2026	C Luke Stevenson assigned to Seattle Mariners Prospects.
	01/30/2026	Seattle Mariners invited non-roster C Luke Stevenson to spring training.
	12/15/2025	Inland Empire 66ers activated C Luke Stevenson.
	08/12/2025	C Luke Stevenson assigned to Modesto Nuts from ACL Mariners.
	08/04/2025	ACL Mariners activated C Luke Stevenson.
	07/19/2025	Seattle Mariners signed C Luke Stevenson.
	07/19/2025	C Luke Stevenson assigned to ACL Mariners.
	06/03/2025	C Luke Stevenson assigned to College Workout.
	02/15/2025	C Luke Stevenson assigned to North Carolina Tar Heels.
	04/02/2024	C Luke Stevenson assigned to Harwich Mariners.
	03/24/2024	C Luke Stevenson assigned to North Carolina Tar Heels.
	06/15/2023	C Luke Stevenson assigned to College Workout.
	07/18/2022	C Luke Stevenson and assigned to High School Workout.