Jhonny Peralta's(FSY) debut with Detroit was powerful enough to withstand a late grand slam by David Ortiz(FSY).

Peralta hit two homers in his first game since being traded and the struggling Tigers beat the Boston Red Sox 6-5 on Friday night despite Ortiz's ninth-inning homer against closer Jose Valverde(FSY).

Peralta, obtained from the Cleveland Indians on Wednesday, hit a solo homer in his first at-bat in the second inning then connected again off Jon Lester(FSY), a two-run shot in the fifth.

"It's something special, this first at-bat for the Tigers," Peralta said. "I feel good to come here the first game and do what I'm doing"

Going into the game, Peralta had just two singles in 15 at-bats against Lester with one RBI, five strikeouts and two double plays. On Friday he also walked against Lester and singled off Ramon Ramirez(FSY).

"He hadn't had much success with (Lester) but neither have a lot of other guys," Detroit manager Jim Leyland said. "So it was nice to see him get on the board right away as a Tiger."

Detroit took a 6-1 lead into the ninth and Valverde struck out leadoff hitter Eric Patterson(FSY). Then he walked the next three batters and Ortiz connected for his 22nd homer, just clearing the low fence in right field.

"It was a nice swing," Boston manager Terry Francona said. "Would have been nicer if it was a five-run homer."

With two outs, Adrian Beltre(FSY) then doubled and J.D. Drew(FSY) was walked intentionally. But on his 60th pitch of the game, 12 more than his previous career high, Valverde retired Mike Cameron(FSY) on a called third strike with a splitter.

"That's a pretty gutsy pitch," Francona said. "I would have been looking for a fastball, too."

The pitcher pounded his right fist on the mound and catcher Gerald Laird(FSY) punched the air as the ball broke over the plate.

"I just didn't get it done," said Cameron, who struck out in his last three at-bats, twice against Valverde. "One of those rough nights. Threw a good pitch."