Burleson (.942 OPS vs right-handers) faces Cavalli while Wood (.957) targets Leahy's left-handed split -- Cardinals hold the platoon edge at the plate, Nationals in the rotation

BOTTOM LINE

Edge: Alec Burleson ranks 6th of 226 NL batters with at least 60 plate appearances vs right-handed pitching (.942 OPS; league average .703), and he draws a right-handed starter in Cade Cavalli tonight at Busch Stadium. Against left-handed pitching he has managed a .561 OPS (league average .735).

Threat: James Wood ranks 5th of 226 NL batters with at least 60 plate appearances vs right-handed pitching (.957 OPS; league average .703). Wood bats left-handed and faces Kyle Leahy, who is stronger against right-handed batters this season: .588 OPS allowed vs right-handed batters, compared with .852 OPS allowed against left-handed batters. Wood steps in on Leahy's weaker side.

Watch: Kyle Leahy carries a pronounced split and a late-game vulnerability. If Washington's left-handed core reaches him deep into the game, watch whether Oliver Marmol pulls Leahy before the third pass -- Leahy has pitched into a third pass in 21 of 28 starts, and his third-pass figure stands at 1.016 OPS allowed this season.

Leahy vs Washington's left-handed bats. Kyle Leahy is stronger against right-handed batters this season: .588 OPS allowed, compared with .852 OPS allowed against left-handed batters -- and Washington's roster carries six left-handed hitters. James Wood leads that group: his 2026 OPS vs right-handed pitching is .957, 5th of 226 NL batters with at least 60 plate appearances vs right-handed pitching. CJ Abrams checks in at .895 OPS vs right-handers this season (14th of 226), and Daylen Lile at .794 (46th of 226). All three sit squarely on Leahy's weaker side.

Cavalli vs Cardinal right-handed bats. Cade Cavalli is stronger against right-handed batters this season: .611 OPS allowed, compared with .692 OPS allowed against left-handed batters. St. Louis sends seven right-handed bats into that stronger split. Jordan Walker's 2026 OPS vs right-handed pitching is .786 (55th of 226 NL batters with at least 60 plate appearances vs right-handed pitching); Ivan Herrera's is .708 (116th of 226). Both face Cavalli's better side tonight.

Leahy's third-pass exposure. Kyle Leahy's first-pass OPS allowed is .574 in 2026; his third-pass figure is 1.016 across 92 batters faced. He has pitched into a third pass in 21 of 28 starts, so Washington's lineup can expect that exposure -- particularly its left-handed core on his weaker side. The third-pass figure comes only from the starts he was left in.

Cavalli's third pass is his strongest. Cade Cavalli's second pass is his weakest this season at .723 OPS allowed, and his third-pass figure is .561 across 141 batters faced. He has pitched into a third pass in 26 of 31 starts. St. Louis must produce in the first two turns rather than waiting for a late-inning fade from Cavalli.

-- James Wood, third-pass window. If Kyle Leahy reaches a third pass -- he has pitched into one in 21 of 28 starts this season -- watch James Wood from the left-handed side. Wood's 2026 walk rate of 16.8% ranks 2nd of 169 NL hitters with at least 200 plate appearances -- making a long at-bat or an early exit more likely if Leahy falls behind in counts.

-- Leahy at home vs. his road numbers. If Leahy commands his ground-ball rate -- 52.9% in 2026, 32nd of 126 NL pitchers with at least 60 innings (league average 48.7%) -- in the early innings, watch his home-side context: he carries a 2.79 ERA at Busch Stadium against 3.94 on the road in 2026.

-- Washington baserunning vs. Pages/Leahy. If Washington gets runners on base, watch the Cardinals' stolen-base exposure: Nasim Nunez (46 stolen bases, 82.1% success in 2026), CJ Abrams (29 stolen bases, 82.9%), and James Wood (21 stolen bases, 87.5%) are active threats, and Pedro Pages has thrown out 32.2% of attempted base stealers this season behind the plate for St. Louis.

-- Riley O'Brien save situation. If St. Louis carries a lead into the late innings, watch the bullpen close: Riley O'Brien has blown 2 saves in his last 5 appearances (September 7 through September 16), and the bullpen as a whole has blown 6 saves in the last 15 games.