Mason Peters

21-Year-Old PitcherP

Seattle Mariners Rookie

2025 Stats

W-L

0-0

ERA

0.00

WHIP

0.00

Rest-of-Season Projections

W-L

ERA

WHIP

Unlock Our Projections

2025 Fantasy Outlook

There was no outlook written for Mason Peters in 2025. Check out the latest news below for more on his current fantasy value.

League Rookie

Bats L

Throws L

40 Man No

DOB 12/18/2003

Selected by Seattle

PSeattle Mariners R

July 14, 2025

The Mariners have selected Peters with the 122nd overall pick in the 2025 First-Year Player Draft.

Analysis
A 5-foot-11 left-hander out of Dallas Bapist University, Peters posted a 4.25 ERA with a 12.3 K/9 and 3.4 BB/9 across 42.1 innings during the 2025 season. He started in just four of his 20 appearances.