"I'm not sure when he's going to pitch, really," interim manager Jim Riggleman said during his media session prior to Monday night's game at Shea Stadium. "The only thing I know is that the trainer said [Bedard] would not make his start on Wednesday."
Riggleman adjusted the Mariners rotation. Right-handed knuckleball specialist R.A. Dickey will start on Tuesday night's game, and right-hander Miguel Batista gets the nod for Wednesday night's series finale.
Bedard, 4-4 with a 3.97 ERA in 13 starts this season, was on the 15-day disabled list from April 8-26 with hip soreness, and there is a possibility of him revisiting the DL.
"I hope not, but I guess that's a possibility down the road," Riggleman said. "I don't think we are thinking that way yet. Maybe he can come back shortly after [Thursday's] off-day."
Riggleman said it was important for Bedard to have a "side day to the extent he can let it go and feel confident that it won't flare up again," before getting another start.
"All of us at one time or another have tweaked our backs," Riggleman said.
Bedard pitched one inning after hitting a single in the top of the third and being forced out on a double play. He said his back stiffened on a full-count pitch to Braves infielder Ruben Gotay.
After the inning ended, Bedard walked off the field and the closer he got to the dugout, "the more pain you could tell he was in," Riggleman said.
"I've never had a back spasm before," Bedard said after the game. "Now I sure know what they are. I had to be helped up the hallway [to the clubhouse]. I couldn't walk."
Jim Street is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.