With Roy Halladay pitching tomorrow, one suspects it’s today’s game, which pits Darrell Rasner against John Parrish, that will decide which team wins this series.

Since he was briefly removed from the rotation, Rasner has posted a 4.19 ERA and a 1.24 WHIP in four appearances (three starts). The best of those was his 6 2/3 innings of one-run ball against the Blue Jays in Toronto two starts ago. The worst was his last, when he failed to get out of the fourth inning against the Orioles.

Parrish, who spent most of his major league career as a lefty reliever for the Orioles, was recently recalled from triple-A Syracuse. He’s making his fifth major league start of the season and his first in more than a month. He posted a 4.71 ERA and a 1.33 WHIP in the first four. His only other start against the Yankees was his major league debut in July 2000.

Joe Girardi’s lineup makes no concessions to the opposing lefty.

For those who missed it, the Yankees swapped David Robertson out for Alfredo Aceves before Thursday’s game. The 25-year-old Aceves, who pitched well in his final two starts for Scranton (12 IP, 6 H, 2 R, 5 BB, 16 K) and posted a 2.62 ERA in 140 2/3 innings across three minor league levels in this his first professional season, will work out of the bullpen. He’s also the first Yankee to wear number 91 during the regular season.