Diamondbacks vs Cardinals: Live Score, Key Matchups & How to Watch Tonight’s NL Showdown

The Arizona Diamondbacks travel to Busch Stadium today for a makeup game that could reshape both clubs’ playoff outlooks. Arizona jumped on St. Louis early and carries a 4-2 lead into the late innings behind Brandon Pfaadt’s five-inning, two-run effort and Blaze Alexander’s two-run homer. Why tonight matters • Season series: Diamondbacks lead 4-2, out-scoring the Cards 32-24. A victory would clinch the head-to-head tiebreaker. • NL wild-card race: Arizona entered the night 1.5 games back of the final spot, while St. Louis sat 2.0 behind the Cubs. • Momentum swing: Each club has hovered near .500 all month; taking this standalone matchup avoids an off-day loss of ground. Pitching breakdown • Diamondbacks: RHP Brandon Pfaadt (4-1, 4.58 ERA) relied on a lively four-seamer and cutter combo to strand five runners through five. Torey Lovullo will likely bridge the final frames with lefty Andrew Saalfrank and closer Paul Sewald. • Cardinals: Rookie RHP Michael McGreevy (4-7, 2.92) labored through 93 pitches and was lifted after allowing three runs in the fourth. Oliver Marmol’s bullpen—still minus JoJo Romero (IL)—must hold serve to give the offense a shot. Key matchups • Corbin Carroll vs Ryan Helsley: Carroll owns a .926 OPS against velocity 97+ mph; Helsley’s heater averages 99.3. • Masyn Winn vs Kevin Ginkel: Winn’s 41% pull rate makes the sinker/slider specialist Ginkel a ground-ball weapon late. Injury report Arizona is still without Ketel Marte (hamstring, day-to-day) and All-Star ace Zac Gallen (elbow, targeting late July). St. Louis hopes to get Pedro Pagés (knee) back this weekend, while slugger Nolan Arenado continues to battle back tightness but remains in tonight’s lineup. How to watch and stream • TV: MLB Network (out of market), Bally Sports Midwest, Arizona Sports 98.7 FM. • Live stream: MLB.TV subscribers nationwide; cord-cutters can use Fubo’s free trial option for regional feeds. • First pitch: 5:15 p.m. ET (4:15 CT). Forecast calls for clear skies and 82 °F. Latest odds & expert pick Hard Rock Bet opened St. Louis –126 (Arizona +105) with an 8.5-run total. The early two-run cushion now swings live money-line value heavily toward the Snakes, but the over is far from safe given both bullpens’ recent form (combined 2.91 ERA since July 15). Best bet: Diamondbacks +1.5 (run line). Arizona’s lineup mashes right-handed pitching (.777 OPS, 5th in NL), and a rested back-end relief corps shortens the game once Pfaadt is out. What’s next The Diamondbacks head to San Diego tomorrow for a crucial NL West set, while the Cardinals stay home to host the Pirates. With both divisions tightening, tonight’s “make-up, must-win” is anything but routine. SEO focus: Diamondbacks vs Cardinals live stream, start time, odds, prediction, picks, injuries, pitching matchup, NL wild-card standings, Busch Stadium weather, MLB game today.