2026 MLB Draft Prospect · RHP

Isaac
Yeager

Oregon State Beavers  ·  6'6" 254 lbs  ·  Senior
2.04
ERA 2026
6–2
Record
39.2
Inn. Pitched
21/25
Scoreless App
49
Strikeouts
.184
AVG Against
58.1%
Groundball Rate
2.33
SIERA
3.53
FIP
Stats via D1Baseball ↗
The Story

Seattle to Corvallis

Isaac Yeager — OSU Beavers

Isaac came to Oregon State as a Washington transfer with three years of Division I experience — a slider and a two-seamer already in his arsenal, and a strikeout rate that had climbed every single season. The stuff was always elite — the environment just needed to catch up.

Under the coaching staff in Corvallis, he didn't just refine what he had — he added a four-seam fastball, transforming from a two-pitch reliever into a legitimate multi-weapon arm. His command tightened, the slider became a true swing-and-miss out pitch, and a 4th-year senior became one of the most dominant relief arms in college baseball.

Pitch Arsenal

The Stuff

Slider — Out Pitch
Velocity83–86mph
Spin Rate2,428–2,712rpm
Vert. Break-1 to -12in
Sinker / Two-Seam
Velocity93–95mph
Spin Rate2,392–2,436rpm
Horiz. Run+14 to +21in
GB%58.1%
Four-Seam Fastball
Velocity93–96mph
Season High96mph
Spin Rate2,491–2,496rpm
Vert. Break+13 to +19in
2026 Command
K%31.4%
BB%7.1%
K–BB%24.3%
Advanced 2026
FIP3.53
xFIP3.87
SIERA2.33
Batted Ball Profile
GB%58.1%
HR/FB%5.3%
LD%19.8%
Pitch data via DAM Analytics ↗
Pitch Data · Best K per Game
Slider
vs Michigan
2/13 · College Baseball Classic · 1.1 IP
84
mph
2,481 RPM
K
Slider
vs Stanford
2/15 · College Baseball Classic · 2.0 IP
84
mph
2,587 RPM
K
Slider
vs Purdue
2/22 · Karbach Round Rock Classic · 1.0 IP
81
mph
2,604 RPM
K
Slider
vs Houston
2/27 · Frisco Classic · 0.1 IP
82
mph
2,532 RPM
K
Four-Seam
vs Iowa
3/1 · Frisco Classic · 2.1 IP · 2K
95
mph
2,496 RPM
K
Sinker
vs Oregon
3/3 · 1.1 IP
94
mph
2,416 RPM
K
Slider
vs Xavier
3/7 · 1.0 IP · 2K
86
mph
2,613 RPM
K
Slider
vs San Diego
3/15 · 1.0 IP
84
mph
2,467 RPM
K
Slider
vs UC Irvine
3/20 · 1.2 IP · 4K
84
mph
2,665 RPM
K
Slider
vs USC
3/24 · 1.0 IP · 2K
84
mph
2,511 RPM
K
Sinker
vs Lamar
4/4 · 1.1 IP · 3K
95
mph
2,392 RPM
K
Sinker
vs Cal Poly
4/11 · 1.1 IP
94
mph
2,433 RPM
K
Four-Seam
vs Fullerton
4/19 · 2.0 IP
95
mph
2,496 RPM
K
Four-Seam
vs Hawaii
4/26 · 2.0 IP · 3K
95
mph
2,494 RPM
K
Slider
vs CSUN
5/2 · 4.0 IP · 7K
86
mph
2,712 RPM
K
Slider
vs LB State
5/8 · 2.0 IP
84
mph
2,488 RPM
K
Slider
Playoffs
vs Yale
5/30 · Eugene Regional · 1.1 IP · 2K
85
mph
2,608 RPM
K
Slider
Playoffs
vs Oregon
6/1 · Eugene Regional · Elim. Game
86
mph
2,668 RPM
K
Pitch data sourced from DAM Analytics ↗
Career Statistics

Year by Year

Last updated · Source D1Baseball ↗
In the Press · NCAA Eugene Regional Final · June 1, 2026

"Oregon unable to get a hit on OSU reliever Isaac Yeager, who was topping out at 96 mph on his fastball. Yeager has been one of the Beavers' best pitchers out of the bullpen all year."

Oregon Daily Emerald ↗  ·  Oregon vs. Oregon State, Eugene Regional Final
2023 · University of Washington
4.70
ERA
0–0
W–L
4
Strikeouts
7.2
IP
2.09
WHIP
.333
AVG Against
9
App
78.1%
LOB%
2024 · University of Washington
6.34
ERA
2–1
W–L
31
Strikeouts
38.1
IP
1.54
WHIP
.289
AVG Against
21
App
57.8%
LOB%
2025 · University of Washington
3.78
ERA
4–1
W–L
57
Strikeouts
47.2
IP
1.32
WHIP
.234
AVG Against
24
App
67.9%
LOB%
2026 · Oregon State University
2.04
ERA
6–2
W–L
49
Strikeouts
39.2
IP
0.91
WHIP
.184
AVG Against
21/25
Scoreless App
81.7%
LOB%
2026 Season Breakdown
Regular Season · 23 App
1.47
ERA
36.2
IP
44
K
20/23
Scoreless
NCAA Playoffs · 2 App
3.0
IP
5
K
1/2
Scoreless
vs Yale 5/30 · 1.1 IP · 2K · 0 ER  |  Elim. Game 6/1 · 1.2 IP · 3K · 3 ER
Career · UW (2023–25) + OSU (2026)
4.05
ERA
12–4
W–L
141
Strikeouts
133.1
IP
1.30
WHIP
.242
AVG Against
79
App
68.5%
LOB%
ERA by Season — Lower is Better
4.70
2023
Washington
6.34
2024
Washington
3.78
2025
Washington
2.04
2026
Oregon State
Dots positioned by ERA — lower dot = better
Strikeout Rate (K%) — Year Over Year
2023 · Washington
10.5%
2024 · Washington
18.2%
2025 · Washington
26.6%
2026 · Oregon State
31.4%
NCAA D1 avg ~22% · Line at 53% of scale
2026 Advanced Metrics vs. MLB Average
Metric Yeager 2026 MLB Avg
SIERA
Skill-based ERA estimator
2.33 ~4.10
FIP
Fielding-independent ERA
3.53 ~4.15
xFIP
Normalizes HR/FB rate
3.87 ~4.20
GB%
Groundball rate
58.1% ~43%
K%
Strikeout rate
31.4% ~23%
BB%
Walk rate
7.1% ~9%
MLB reliever averages sourced from FanGraphs 2024 Reliever Leaderboard ↗. Lower is better for SIERA / FIP / xFIP / BB%; higher is better for GB% / K%.
Game log data sourced from D1Baseball ↗