The Cardinals bullpen is on pace for a franchise-record 602.3 innings this season -- 18 more than the mark set in 2021 -- and how deep Leahy goes tonight, with his OPS jumping to 1.017 in the third pass, decides whether that gap keeps growing

PIT  0 0 0 0 1 0 0 0 0 -- 1
STL  0 0 2 1 0 0 0 1 0 -- 4

St. Louis took the series opener last night, 4-1, behind a strong start from Mathews and a two-run homer by Crooks in the third. Walker went 3-for-4 and scored twice, while Crooks drove in 2. The Cardinals lead the series 1-0 heading into today's afternoon game.

THE BREAKDOWN

WHAT WORKED
- Crooks delivered the game's biggest blow, a two-run homer in the third that put St. Louis ahead to stay, finishing 1-for-3 with 2 RBI.
- Mathews was sharp over 5.2 innings, allowing 1 run on 5 hits with 7 strikeouts.
- Walker carried the offense, going 3-for-4 with 2 runs scored, including on the Crooks homer and a sac fly by Church in the fourth.
- Fernandez tossed 2.0 scoreless innings of relief, adding 2 strikeouts on 0 hits allowed.

WHAT DIDN'T
- The top two spots in the order were silent: Wetherholt went 0-for-4 with 2 strikeouts and Ivan Herrera went 0-for-4.
- Burleson added another 0-for-4 from the three hole, with a strikeout.
- An eighth-inning run scored on a throwing error by Pittsburgh's Gonzalez rather than a Cardinals hit, underscoring a lineup that generated only 9 hits on the night.

BOTTOM LINE

Edge: Leahy takes the mound at Busch Stadium with a 2.91 home ERA and a .597 OPS allowed against right-handed batters in 2026 -- a meaningful early-inning cushion against a Pittsburgh lineup built predominantly right. With a 53.3 GB% generating soft contact and a 2026 K% of 21.7, he profiles as a groundball-first arm who limits damage through two turns of the order. The Cardinals hold the structural advantage as long as Leahy is in the game.

Threat: Bachar comes in as a road pitcher whose away ERA sits at 4.99 this season, and his .739 OPS allowed away from home reflects a more hittable version than his overall line suggests. The threat is real, though: a 25.0 K% gives him the arsenal to strand rallies and keep the Cardinals offense from stringing together innings. He has held right-handed batters to a .566 OPS in 2026, which bears watching against a Cardinals lineup that skews left itself.

Watch: The Cardinals bullpen is pacing at a franchise-record 602.3 relief innings this season -- well beyond the prior record pace of 584.3 and the 505.7 mark from the season before that. Every early Leahy exit lands on a relief corps already stretched thin. Leahy reached a third pass in 21 of his 25 starts, but when that third pass arrives, it arrives expensive. The leash decision tonight is not abstract; it lands in the context of a bullpen operating at historically unprecedented volume.

Leahy TTO3 meltdown threshold. Leahy has pitched into a third pass in 21 of his 25 starts this season. In the starts where he reaches a third time through, batters post a .789 OPS against him in the second pass -- and a 1.017 OPS in the third, a .228-point jump that ranks in the 82.9th percentile of all pitchers' within-game rises. St. Louis's ability to limit his exposure past two turns is the central decision of this afternoon's game.

Leahy vs. LHB vulnerability. Pittsburgh's left side of the lineup -- Oneil Cruz and switch-hitters Bryan Reynolds and Jake Mangum, both of whom bat left against a right-hander -- face the sharpest crack in Leahy's armor. 2026 to date: Leahy has allowed a .306/.379/.460 line against left-handed batters across 278 batters faced, a .839 OPS that stands well above his right-handed-batter mark. His 2025 vs-LHB figure (.701 OPS, 163 PA) understates the current exposure -- the 2026 sample at 278 BF now carries the heavier weight.

Bachar vs. Cardinals LHB. Lake Bachar enters Busch Stadium carrying a pronounced split disadvantage. 2026 to date: Bachar has allowed a .701 OPS against left-handed batters across 169 BF, with his 2025 mark (.604 OPS, 142 PA) running lower -- the larger current sample points in a less favorable direction for Pittsburgh. Against right-handed batters his 2026 OPS allowed drops to .566 across 131 BF (.758 in 2025 across 154 PA). St. Louis's five lineup LHBs -- Wetherholt, Burleson, Church, Gorman, and Crooks -- represent the Cardinals' primary avenue against him today.

Bryan Reynolds career vs. Leahy. Reynolds bats third for Pittsburgh today at DH and enters 0-for-4 with three strikeouts in his career against Leahy -- the most significant batter-versus-pitcher liability in the Pittsburgh lineup. Reynolds is a switch hitter who posted a .774 OPS (.249 AVG) against right-handed pitching across 391 PA in 2026, building on a .241/.312/.390 line in 487 PA in 2025; that track record underscores how much a 0-for-4 career sample costs the Pirates' most dangerous bat in a short series game.

-- Kyle Leahy. Leahy has pitched into a third pass in 21 of his 25 starts this season. If he approaches the 60-to-75-pitch window, watch whether the Cardinals pull him before Pittsburgh cycles through a third time -- his third-pass .614 SLG (92 batters faced) is the sharpest late-game exposure in this matchup.

-- Oneil Cruz. If Cruz reaches base, watch whether he tests Jimmy Crooks. Cruz has posted an 84.6% stolen-base success rate across 22 steals in 2026, and Crooks has thrown out just 1 of 15 would-be stealers in 2026 -- nearly every Cruz on-base event becomes a running situation.

-- Lake Bachar. Bachar carries a 4.99 ERA in road starts this season against a 2.16 mark at home. If the Cardinals string two or more baserunners together in an inning, watch whether that road-context pattern compounds into a multi-run sequence.

-- Jordan Walker. Walker enters at .855 OPS in 2026, the lineup's highest-upside right-handed threat. Bachar has allowed a .758 OPS to right-handed batters historically (154 PA, 2025). If Walker sees a fastball count early, he is the batter most likely to punish it.