By Sean McAdam
CSNNE.com Red Sox Insider Follow @sean_mcadam
PHOENIX -- Josh Beckett, who was scheduled to work the second inning of the All-Star Game Tuesday night, decided not to pitch when he felt some tenderness in his left knee during his warmup session in the bullpen.
Beckett had hyperextended the knee last Friday against Baltimore and left after five innings.
"I was warming up and I didn't feel 100 percent, said Beckett of the knee. "I told Tito Francona when I left that if I feel it at all, I'll speak up. It wasn't something I was comfortable going out and messing with.
"I don't think I really hurt it further. But I still definitely have got some inflammation.
That said, he still thinks he'll make his scheduled start Sunday.
"I think it's really a strong possibility," he said. "At worst, we might push it back a day or two."
Beckett spoke by phone with both Terry Francona and trainer Mike Reinold. Neither was terribly concerned about the knee.
Beckett said American League manager Ron Washington was "great when Beckett told him he couldn't go. Beckett said Washington had vowed that players would be returned to their teams in the same physical condition as when they arrived in Phoenix.
New York Yankees reliever David Robertson pitched the second and was given extra time to warm up since he hadn't anticipated coming into the game that early.
"I could have pitched, said Beckett. "But I'm just not comfortable going out to pitch in an All-Star game and then costing myself starts in the second half.
"This game does mean a lot with the home-field advantage in the World Series hinging on the outcome, but there are things ahead in the regular season that are a little more important.
Beckett decided to stop throwing when he had "about 10 pitches left in his bullpen session.
"I think I would have pitched if it had been a regular-season game, he said. "It wasn't one pitch. It just progressively got a little stiffer. I think I did the right thing here.
Just hours earlier, Beckett said his knee felt fine and he planned to have a "light side session Friday in St. Petersburg in anticipation of making his first second-half start Sunday night against the Tampa Bay Rays.