Quinn Mathews is a Common 64 OVR Starting Pitcher card for the Cardinals, part of the Live set in MLB The Show's Diamond Dynasty. He throws left-handed. The card was added to Diamond Dynasty in August 2026.

On the mound, Quinn Mathews works with a 4-pitch arsenal led by a 95 mph 4-Seam Fastball and a 84 mph Slider. His pitching ratings include 77 Velocity, 53 Control, and 61 Break. The profile favors a balanced mix of command and movement.

DiamondOps grades each pitch in Quinn Mathews's arsenal: Slider (S), 4-Seam Fastball (S), Changeup (B), and Curveball (B). 2 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 Slider, so the two share a release look. Velocity works against the card here — its 77 mph 4-Seam Fastball is slow enough to cost it in the arsenal score. 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, Quinn Mathews currently buys for about 71 stubs, with sell orders near 5 stubs. Over the past 7 days the buy price has climbed roughly 184%. Flipping at current buy and sell prices nets roughly 57 stubs, about a 950% return. DiamondOps flags the card as currently overpriced.

OpScore is DiamondOps' composite rating of a card's in-game performance value. Quinn Mathews earns an OpScore of 48.8 on Legend difficulty, ranking #2824 among all cards and #569 among Starting Pitchers.