Relatively unheralded as a Washington high schooler because he wasn't a regular on the showcase circuit, Bresnahan lasted 398 picks in the 2023 Draft before signing with the Guardians for fifth-round money ($375,000). He pitched four innings that summer before getting his first extended taste of pro ball in 2024, when he led the Rookie-level Arizona Complex League with 63 strikeouts in 46 innings and was named its pitcher of the year. Shipped to the Giants for Alex Cobb at the Trade Deadline, he looked tired while finishing the season in Single-A.
Bresnahan added fastball velocity in his first full year as a pro, operating at 91-94 mph and touching 96 with riding action that enticed a lot of chases in the ACL. His best secondary pitch is a mid-80s changeup with significant fade when it's on, though he's still learning to throw it for strikes. His low-80s slider has some sweeping action and has gained consistency in 2025.
Bresnahan uses his 6-foot-4 frame and athleticism to move down the mound well and create a lot of extension in his delivery. The next step will be to add more muscle to his projectable build so he can maintain his stuff and mechanics over the course of a long pro season. He has the ceiling of at least a No. 4 starter, perhaps more if his pitches add more power as he gains strength.
Bresnahan attended few showcase events, so he was relatively unheralded when the Guardians drafted him in the 13th round out of a Washington high school in 2023 and signed him away from an Oregon commitment for $375,000, the equivalent of fifth-round money. After pitching briefly last summer, he led the Rookie-level Arizona Complex League with 63 strikeouts in 46 innings this year. The Giants acquired him in July along with a player to be named in exchange for Alex Cobb.
Bresnahan's fastball has added about 2 mph since he turned pro, now sitting at 91-93 mph and touching 95, and he should gain more velocity as he fills out his 6-foot-4, 195-pound frame. His heater dominated ACL hitters because it has quality ride and chase characteristics. Both of his low-80s secondary pitches show promise, a tight slider and a changeup with significant fade.
Using his size and athleticism, Bresnahan creates extension that allows his pitchers to get on hitters more quickly than they expect. He repeats his delivery and provides regular strikes, giving him the look of a three-pitch lefty starter. He's a potential No. 4 starter with more upside to come if his fastball gains more steam and he refines his slider and changeup.
