PITTSBURGH — Assuming that Washington’s home doubleheader with San Francisco isn’t rained out today, the pitching matchups are now set for the Mets’ three-game series at the Nationals that begins Friday night. Here is the breakdown:

Friday — RHP Tim Redding (0-2, 9.20) vs. RHP Shairon Martis (5-1, 5.62), 7:05 p.m., SNY.

Saturday — RHP John Maine (5-3, 3.75) vs. LHP John Lannan (2-5, 4.21), 7:05 p.m., PIX-11.

Sunday — RHP Livan Hernandez (4-1, 4.33) vs. RHP Craig Stammen (0-1, 5.71), 1:35 p.m., SNY.