PHILADELPHIA - Matt Stairs hit a grand slam, Lyle Overbay drove in four runs with a triple and homer and the Toronto Blue Jays beat the Phillies, 13-2, tonight.

Troy Glaus also homered for the Blue Jays, who tagged Jamie Moyer for seven runs.

Stairs hit his 10th career grand slam during a six-run eighth inning against reliever Clay Condrey. It was the third home run of the year for Stairs, who went 3-for-5.

Shaun Marcum pitched six strong innings in his second start this year after 13 relief appearances. Marcum (2-2) allowed two runs, four hits and struck out six. He ran his hitless streak as a starter to 10 innings, before Chase Utley homered leading off the bottom of the fifth.

Marcum pitched six hitless innings in a 2-1 loss to Tampa Bay last Sunday. He left that game after 78 pitches because manager John Gibbons didn't want to overextend him. Marcum replaced the injured Victor Zambrano in Toronto's injury-depleted rotation.

Moyer (4-3) allowed eight hits in 3 1-3 innings in his second consecutive subpar outing and his worst start since joining the Phillies last August. It was his shortest stint since lasting 2 1-3 innings against the New York Yankees on May 11, 2005.

The 44-year-old left-hander had pitched at least six innings in each of his first eight starts this season and 15 of 16 after coming to Philadelphia from Seattle. Moyer's ERA has risen from 3.00 to 4.37 in his last two starts.

For the second time in three days, the Phillies (21-22) missed a chance to go over .500 for the first time this season.

Moyer pitched out of jams the first two innings, but ran into trouble in the third. Alex Rios walked to start the inning and scored on Overbay's triple that was misplayed by center fielder Aaron Rowand. Vernon Wells followed with an RBI single and Glaus hit a two-run shot to make it 4-0.

John McDonald singled to start the fourth and Marcum walked, a clear sign Moyer was struggling. After Rios hit a fielder's choice grounder, Overbay drove one into the right-field seats to give the Blue Jays a 7-0 lead.

After Utley connected, Abraham Nunez had an RBI single for Philadelphia's other run.

Notes. Glaus is hitting .353 (18-for-51) with five homers and 15 RBIs against Moyer. . . . The Phillies are 0-3 when their record is even, including a loss on opening day. . . . Toronto scored a season-high runs.