Miami ? So far this year, Florida Marlins right-hander Josh Beckett has developed four blisters on one finger and an apparent tendency to tip off his pitches.

Other than that, his rookie season is going great.

Beckett will take the mound again today at Philadelphia, hoping to show that the worst drubbing of his brief career last week against Cincinnati was a fluke. He retired just three batters and gave up eight hits and seven runs, which hiked his ERA from 2.90 to 4.09.

“They were hitting it like they knew what was coming,” Beckett said.

That might explain the performance. Recurring blisters on the middle finger of his pitching hand have forced Beckett to alter his grip, perhaps causing him to inadvertently indicate what kind of pitch he’s about to throw.

Cincinnati slugger Adam Dunn said Beckett positioned his right hand in his glove differently when he was about to throw a curve. Other Reds hitters said they didn’t notice the rookie tipping any pitches, but Marlins manager Jeff Torborg and pitching coach Brad Arnsberg were suspicious.

“It seemed like they knew something,” Torborg said. “I stood there that night wondering. They hit everything he threw, including a couple of curveballs inside that they should have been fooled on.”

Former major league catcher Jim Leyritz stopped by the Marlins’ clubhouse last week to tell Arnsberg that Beckett positioned his glove one way before throwing a fastball and another way for a curve.

Arnsberg studied game video for over an hour, trying to spot such disparities.