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Scouting Report
Updated May 19, 2026
David Peterson, 30-year-old left-handed pitcher for the New York Mets, has found significant success transitioning to a bulk relief role after struggling as a starter. As a reliever in 2026, Peterson has posted a 1.69 ERA with a 0.94 WHIP across 16 innings in relief appearances, compared to an 8.10 ERA and 1.89 WHIP as a starter. He recently earned his first win of the season in a bulk relief outing against the Rockies, allowing 2 runs on 3 hits with 6 strikeouts over 4 innings. Peterson has shown improved command with his sinker and four-seamer, and his slider continues to be effective. The Mets have adopted an opener strategy (using Huascar Brazoban) before bringing Peterson in for bulk innings, which has yielded much better results. Manager Carlos Mendoza praised Peterson's recent performance, noting he "got ground balls, made pitches" despite defensive lapses. Peterson has now worked in relief in 5 of his last 6 appearances.
Strengths
- + Dominant relief ERA of 1.69 vs 8.10 as starter
- + Strong strikeout rate in relief (6 K's in 4 IP vs Rockies)
- + Effective sinker and four-seamer command
- + Reliable slider performance
- + First win of season earned in bulk role
- + Career history of success as reliever (2.41 ERA in regular season relief)
- + Postseason relief experience (2.08 ERA in 2024 playoffs)
- + Manager confidence and praise
- + Three consecutive solid relief outings
- + Better feel with changeup recently
About
Michael Petersen is a rp for the Miami Marlins.
Player Overview
RP
Miami Marlins