P | Bats/Throws: R/R | 6' 4" 230 lbs | Age: 24
Draft: 2023 | Rd. 5, No. 139, Oakland Athletics | Texas A&M
MLB Pipeline Rank
Athletics: No. 29
W L ERA G GS SV IP SO WHIP
2026 0 0 0.00 1 0 0 1 1 0.00
Career Minors 10 17 5.13 48 40 0 203.1 180 1.56
G W-L ERA IP SO WHIP
2026 1 0-0 0.00 1 1 0.00
Career Minors 48 10-17 5.13 203.1 180 1.56
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Standard Minor League Pitching Statistics

SeasonTmLGLWLERAGGSSVIPHRERHRBBSOWHIP
2023 ACL Athletics ACL ROK 0 0 0.00 2 2 0 3.0 2 0 0 0 1 3 1.00
2024 Stockton Ports CAL A 0 2 10.24 4 3 0 9.2 16 11 11 2 4 11 2.07
2025 2 Teams Minors 6 9 5.93 25 20 0 109.1 142 79 72 10 45 88 1.71
2025 Stockton Ports CAL A 5 5 5.42 19 14 0 79.2 100 54 48 5 31 68 1.64
2025 Lansing Lugnuts MID A+ 1 4 7.28 6 6 0 29.2 42 25 24 5 14 20 1.89
2026 3 Teams Minors 4 6 3.65 17 15 0 81.1 82 37 33 3 25 78 1.32
2026 Stockton Ports CAL A 1 2 2.96 6 5 0 27.1 26 12 9 1 5 26 1.13
2026 Lansing Lugnuts MID A+ 3 4 4.08 10 10 0 53.0 56 25 24 2 20 51 1.43
2026 Midland RockHounds TEX AA 0 0 0.00 1 0 0 1.0 0 0 0 0 0 1 0.00
ACL Athletics ACL ROK 0 0 0.00 2 2 0 3.0 2 0 0 0 1 3 1.00
Midland RockHounds TEX AA 0 0 0.00 1 0 0 1.0 0 0 0 0 0 1 0.00
Lansing Lugnuts MID A+ 4 8 5.23 16 16 0 82.2 98 50 48 7 34 71 1.60
Stockton Ports CAL A 6 9 5.25 29 22 0 116.2 142 77 68 8 40 105 1.56

Scouting Report

2026

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

Dettmer spent three years as a mainstay at Texas A&M, showing glimpses of exciting stuff -- highlighted by seven shutout innings in the Men's College World Series as a sophomore in 2022 -- albeit with very mixed results. Excitement for his junior year dissipated when he got hit hard and struggled with his command in 2023. His size and potential were enough for teams to consider on Day 2 of the Draft, and the A's nabbed him in the fifth round, but he proceeded to throw in just four games during his first full season because of bone spurs in his elbow. He topped 100 innings in 2025, though he again got knocked around, but he started to figure things out and have some success in 2026, earning a bump to High-A for the first time in May.

Like he did with the Aggies, Dettmer's stuff starts with a heavy power sinker, a fastball up to 96 mph thrown with good sink that elicits a very good ground-ball rate. His slider -- a low-80s breaker that misses a decent amount of bats -- offers more sweep than it did in the past. He works in a low-80s changeup that can be effective as well.

While he's yet to be tested at higher levels, it has been encouraging to see Dettmer throw more quality strikes this year than he has previously. He's learning that his stuff is plenty good enough to get outs and he's been more in attack mode instead of working more passively to induce contact with his sinker. He could be coming around at just the right time, as the pitching pendulum swings back towards hurlers who feature sinkers thanks to hitters who have adjusted to four-seamers with carry up in the zone.


Draft

Video scouting report »

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

Dettmer was on scouting radars as a Texas high schooler in 2020, but not to the extent that he would get drafted to try to lure him away from Texas A&M. He finished last season with seven shutout innings against Notre Dame at the College World Series, then sparked more interest by popping 99 mph with his fastball during fall practice after peaking at 96 as a sophomore. But he has been hammered this spring, leaving clubs uncertain about where he should fit into the Draft. 

Dettmer's fastball has maxed out at 96 again this year and lost some of its trademark sink and run, and his heater has gotten hit hard when he hasn't commanded it. His best offering is a solid slider that features tight break in the low 80s. He tries to keep left-handers off the fastball with a mid-80s changeup that has featured quality tumble in the past but has had less life in 2023.  

Working from a high three-quarters slot, Dettmer has seen his control regress this spring and even when he threw more strikes, command wasn't his strong suit. He has a strong 6-foot-4 frame built for a starter's workload. But after entering the year with first-round upside and a chance for perhaps three plus pitches if he could locate them better, he has become an enigma. 



Awards




Transactions

Team Date Transaction
07/21/2026 RHP Nathan Dettmer assigned to Midland RockHounds from Lansing Lugnuts.
07/21/2026 Midland RockHounds activated RHP Nathan Dettmer.
05/05/2026 RHP Nathan Dettmer assigned to Lansing Lugnuts from Stockton Ports.
03/07/2026 RHP Nathan Dettmer assigned to Athletics.
09/10/2025 RHP Nathan Dettmer assigned to Mesa Solar Sox.
06/24/2025 RHP Nathan Dettmer assigned to Stockton Ports from Lansing Lugnuts.
05/20/2025 RHP Nathan Dettmer assigned to Lansing Lugnuts from Stockton Ports.
03/20/2025 RHP Nathan Dettmer assigned to Athletics.
11/03/2024 Stockton Ports activated RHP Nathan Dettmer from the 60-day injured list.
07/21/2024 Stockton Ports transferred RHP Nathan Dettmer from the 7-day injured list to the 60-day injured list.
04/28/2024 Stockton Ports placed RHP Nathan Dettmer on the 7-day injured list.
04/03/2024 RHP Nathan Dettmer assigned to Stockton Ports from ACL Athletics.
04/03/2024 Stockton Ports activated RHP Nathan Dettmer.
04/03/2024 Stockton Ports placed RHP Nathan Dettmer on the 7-day injured list.
08/05/2023 RHP Nathan Dettmer assigned to ACL Athletics.
07/17/2023 Oakland Athletics signed RHP Nathan Dettmer.
06/15/2023 RHP Nathan Dettmer assigned to College Workout.
02/24/2023 RHP Nathan Dettmer assigned to Texas A&M Aggies.
05/03/2021 RHP Nathan Dettmer assigned to Texas A&M Aggies.
05/03/2021 RHP Nathan Dettmer assigned to Texas A&M Aggies.