Unable to return to the field because of a 2001 knee injury, Buffalo Bills offensive lineman Jerry Ostroski on Tuesday announced his retirement from the NFL, leaving the game after eight seasons.

Ostroski, 32, had not practiced in training camp nor played in a preseason game because of the knee problem. He injured the knee late last season, after recovering from a broken leg suffered in preseason, and his rehabilitation had not gone well.

Given his lack of activity this summer, the retirement did not come as a surprise to Buffalo officials, who had suggested a few weeks ago Ostroski might have to accept a salary reduction to remain with the team.

"My mind and my heart are still telling me to play but my knee is telling me no," Ostroski said.

The versatile Ostroski started at center, guard and tackle during his career, which began in 1992, when he was chosen by the Kansas City Chiefs in the 10th round of the draft. After being released by the Chiefs and also by the Atlanta Falcons, he signed with Buffalo in 1993 and spent the season on the team's developmental squad.

He became a starter in 1995 and posted 13 or more starts every season until 2001, when he appeared in just seven games.

For his career, the former Tulsa standout started in 102 of 106 games.

Len Pasquarelli is a senior writer for ESPN.com.