Jamie Arnold is a Diamond 88 OVR Starting Pitcher card for the Athletics, part of the Spring Breakout set in MLB The Show's Diamond Dynasty. He throws left-handed. The card was added to Diamond Dynasty in April 2026.

On the mound, Jamie Arnold works with a 5-pitch arsenal led by a 97 mph 4-Seam Fastball and a 95 mph Sinker. His pitching ratings include 99 Velocity, 75 Control, and 95 Break. The profile favors a movement-heavy arsenal built to miss bats.

DiamondOps grades each pitch in Jamie Arnold's arsenal: Slider (S), 4-Seam Fastball (S), Sinker (S), Sweeper (S), and Splitter (A). 4 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 Sinker, so the two share a release look. Its 99 mph Sinker 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, Jamie Arnold currently buys for about 51,610 stubs, with sell orders near 38,974 stubs. Over the past 7 days the buy price has climbed roughly 31%. Flipping at current buy and sell prices nets roughly 7,473 stubs, about a 19% return. DiamondOps suggests waiting for a better entry point.

OpScore is DiamondOps' composite rating of a card's in-game performance value. Jamie Arnold earns an OpScore of 82.5 on Legend difficulty, ranking #875 among all cards and #172 among Starting Pitchers.