John Donaldson is a Diamond 91 OVR Starting Pitcher card for the Free Agents, part of the The Negro Leagues set in MLB The Show's Diamond Dynasty. He throws left-handed. As a two-way card, he can be used as both a hitter and a pitcher in the same lineup. He is also eligible at Center Fielder. The card was added to Diamond Dynasty in April 2026.

On the mound, John Donaldson works with a 5-pitch arsenal led by a 99 mph 4-Seam Fastball and a 95 mph Sinker. His pitching ratings include 99 Velocity, 62 Control, and 95 Break. The profile favors a movement-heavy arsenal built to miss bats.

John Donaldson is eligible at 2 positions, and DiamondOps scores each one separately: Center Fielder (79.7) and Designated Hitter (72.8) on All-Star. The best fit is Center Fielder rather than the listed Starting Pitcher, and that holds at every difficulty. At Center Fielder the card scores 79.7 on All-Star, 82.4 on Hall of Fame, and 82.4 on Legend — it keeps 103% of its All-Star value at the top difficulty, which is unusually durable. Among Starting Pitchers the card ranks #215 on Hall of Fame and #232 on All-Star.

DiamondOps grades each pitch in John Donaldson's arsenal: Slider (S), 4-Seam Fastball (S), Sinker (S), Forkball (A), and Slurve (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 Sinker, so the two share a release look. Its 99 mph 4-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, John Donaldson currently buys for about 21,110 stubs, with sell orders near 18,301 stubs. Over the past 7 days the buy price has fallen roughly 16%. Flipping at current buy and sell prices nets roughly 696 stubs, about a 4% return. DiamondOps suggests waiting for a better entry point.

OpScore is DiamondOps' composite rating of a card's in-game performance value. John Donaldson earns an OpScore of 77.9 on Legend difficulty, ranking #1035 among all cards and #220 among Starting Pitchers.