Bills' McKelvin injures hamstring

EAST RUTHERFORD, N.J. -- Buffalo Bills cornerback Leodis McKelvin injured his right hamstring in the first quarter of Sunday's game at the New York Jets.

McKelvin was initially announced as questionable to return, but was later downgraded to out.

In his place, the Bills moved safety Aaron Williams to cornerback, opposite Justin Rogers. Williams, a second-round pick in 2011, began his career at cornerback but was converted to safety this offseason.

The Bills are already without cornerbacks Stephon Gilmore (fractured wrist) and Ron Brooks (fractured foot).