Liam Peterson is a Red Diamond 97 OVR Starting Pitcher card for the Guardians, part of the 2026 Draft set in MLB The Show's Diamond Dynasty. He throws right-handed. The card was added to Diamond Dynasty in July 2026.

On the mound, Liam Peterson works with a 5-pitch arsenal led by a 99 mph 4-Seam Fastball and a 97 mph 2-Seam Fastball. His pitching ratings include 99 Velocity, 74 Control, and 99 Break. The profile favors a movement-heavy arsenal built to miss bats. Notable quirks include Stopper from a total of 3 quirks.

DiamondOps grades each pitch in Liam Peterson's arsenal: Slider (S), 4-Seam Fastball (S), 2-Seam Fastball (S), Circle Change (A), and 12-6 Curve (B). 3 of them grade S-tier, which is what separates a genuine out-pitch mix from a deep-but-flat arsenal. Its strongest tunnel pairing is the 4-Seam Fastball off the 2-Seam Fastball, so the two share a release look. Its 99 mph 2-Seam Fastball adds a velocity bonus on top. Arsenal grades are the same at every difficulty — unlike a hitter's OpScore, a pitch mix does not re-weight as you climb.

On the Diamond Dynasty market, Liam Peterson currently buys for about 12,821 stubs, with sell orders near 10,077 stubs. Over the past 7 days the buy price has climbed roughly 19%. Flipping at current buy and sell prices nets roughly 1,460 stubs, about a 14% return. DiamondOps suggests waiting for a better entry point.

OpScore is DiamondOps' composite rating of a card's in-game performance value. Liam Peterson earns an OpScore of 95.5 on Legend difficulty, ranking #258 among all cards and #35 among Starting Pitchers.