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PITTSFORD, N.Y. (AP) - Kevin Kolb has returned to practice for the first time since hurting his left knee and says he's ready to compete with rookie EJ Manuel for the starting quarterback job with the Buffalo Bills.

Kolb, however, acknowledged Monday that he has plenty of catching up to do and is still experiencing soreness. Despite being cleared for practice, he says it's too early to determine whether he'll be cleared to play in Buffalo's preseason game against Minnesota on Friday.

Kolb had missed eight days since twisting his knee after slipping on a wet rubber mat during practice on Aug. 4.

Manuel has suddenly gained the edge over the seventh-year player to win the starting job. The first-round draft pick played the entire first half of Buffalo's 44-20 win at Indianapolis on Sunday.