Here are the lineups:
RED SOX (15-7)
Pitching: RHP Ryan Dempster (0-2, 3.38).
Pitching: LHP Erik Bedard (0-1, 6.17).
Game time:7:10 p.m.
TV/radio: NESN / WEEI.
Red Sox vs. Bedard: Ortiz 5-24, Gomes 4-23, Napoli 3-15, Pedroia 1-14, Saltalamacchia 1-9, Victorino 1-7, Drew 0-3, Ellsbury 0-2, Ross 0-2.
Astros vs. Dempster: Cedeno 6-17, Ankiel 2-16, Altuve 0-3, Castro 0-3.
Stat of the Day: The Sox franchise record for wins in April is 18. That was set in 1998 and equaled in 2003. They have 15 wins with four games to play.
Notes: The Sox have won three of four and two straight ... Dempster has pitched pretty well with not much to show for it in four starts. He is 0-2 and the Sox are 1-3 in those games ... Dempster is 6-12, 4.32, in 51 appearances against the Astros, 25 of them starts. He was 1-1, 3.98, in three starts last year ... Bedard is facing the Sox for the first time since June 8, 2008, when he was with Seattle. He is 5-4, 4.25, in 13 career appearances against Boston ... Bedard was acquired by Boston at the 2011 trade deadline and went 1-2, 4.03, in eight starts ... Ortiz is 11 for 20 with four extra-base hits and five RBIs in five games since coming off the disabled list ... Ellsbury has 199 career stolen bases ... Red Sox starters are 12-4, 3.10 ... The Sox are 12 for 25 with runners in scoring position the last two games.
Song of the Day: "White Lightnin' " by George Jones.