ON DECK

BELEAGUERED BULLPEN: The Mets hope to get some innings out of rookie Robert Gsellman (2-2, 3.13) as they wrap a four-game series today against the Phillies. New York used 16 pitchers during the first two games of the series, then had to pull starter Sean Gilmartin after just two outs and five runs Saturday. Gsellman will be making his sixth career start and has never logged more than six innings LESTER IN THE LIMELIGHT: NL Cy Young Award candidate Jon Lester (18-4, 2.36) can impress voters with a prime-time start against the rival Cardinals. The Cubs’ left-hander has never finished higher than fourth in Cy Young balloting and could be in line for his highest career finish thanks to a 1.15 ERA since Aug. 1. Chicago is 11-1 in Lester’s starts since the All-Star break.

NO-BAT BOMBERS: The Yankees’ dormant offense seeks a spark against Toronto after suffering through three consecutive shutouts. New York hasn’t scored since Donovan Solano’s two-run homer in the ninth inning of Wednesday’s win at Tampa Bay, going 0-for-16 with runners in scoring position while stranding 20 over the last three games. Manager Joe Girardi insists effort isn’t an issue for the youthful Yanks, who seek a turnaround against Blue Jays right-hander Marco Estrada (9-9, 3.62).