PITTSBURGH (AP) — Authorities say a former player attacked a western Pennsylvania high school football coach at his home, biting the coach so badly he needed 60 stitches to repair his ear.

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Police and Sharon coach Jim Wildman say they can't explain why 38-year-old Joseph Koscinski barged into the coach's home Sunday.

Wildman says he didn't even realize Koscinski was a former player until police told him the man's name later.

Sharon police Chief Mike Menster says Koscinski was still being treated at a hospital Monday for the attack in Sharon, about 60 miles northwest of Pittsburgh. But he's already in custody and will be charged with aggravated assault and other crimes.

The 66-year-old coach was rehired this year after an 11-year retirement.