Arizona Diamondbacks vs Pittsburgh Pirates Preview
Today's Starting Matchup
Today's starting pitching matchup features Arizona Diamondbacks's Merrill Kelly (8-8, 5.12 ERA) against Pittsburgh Pirates's Mitch Keller (6-7, 4.90 ERA).
Both starters carry similar ERAs, setting the stage for a potential pitchers' duel. WHIP: Merrill Kelly 1.48, Mitch Keller 1.31.
Advanced metrics: Merrill Kelly — FIP 5.85, K% 14.4%, 103.7 IP / Mitch Keller — FIP 4.37, K% 17.9%, 108.3 IP
Team Season Comparison
2026 season record: Arizona Diamondbacks 55-51 (.519), Pittsburgh Pirates 54-52 (.509).
Recent form: Arizona Diamondbacks on a 2-game losing streak, Pittsburgh Pirates on a 1-game win streak.
Based on starting pitching, Pittsburgh Pirates holds the edge.
Bullpen Analysis
Arizona Diamondbacks bullpen: 13 relievers on the active roster. Key arms: Brandon Pfaadt 4.43 ERA, 45K in 65.0IP, Brandyn Garcia (Setup) 2.28 ERA, 32K in 27.2IP, Eduardo Rodriguez 2.64 ERA, 86K in 122.2IP.
Pittsburgh Pirates bullpen: 13 relievers on the active roster. Key arms: Brandon Eisert 6.75 ERA, 38K in 32.0IP, Braxton Ashcraft 4.05 ERA, 135K in 122.1IP, Bubba Chandler 4.47 ERA, 90K in 100.2IP.