Buffalo Bills quarterback EJ Manuel underwent a procedure on his left knee Sunday, but head coach Doug Marrone is still hoping to have the rookie back in time for the regular season.
"I really view this procedure as minor," Marrone said Sunday. "He won't be here for the preseason, but my expectation is that he will be day to day after that."
Marrone said Manuel is expected to be "day to day" following the preseason.
"We should be able to judge better in two weeks when EJ comes back," Marrone said.
Manuel had swelling in his left knee a day after his strong performance in Friday's preseason win over the Minnesota Vikings. He completed 10 of 12 passes for 92 yards with a touchdown.
Kevin Kolb will start the Bills' next preseason game against the host Washington Redskins on Aug. 24.
"I look forward to the challenge and the expectations," said Kolb.
Marrone has also praised undrafted rookie Jeff Tuel.
"I've said this from the beginning: I'm going to prepare like I'm No. 1," said Tuel. "That's the best way to approach this."
Manuel was taken No. 16 overall by the Bills in April.
The Bills also announced they have released defensive backs Don Unamba and Mark LeGree, offensive tackle Tony Hills and wide receiver Terrell Sinkfield.