Dustin Hopkins in uniform at practice

ORCHARD PARK, N.Y. -- Buffalo Bills kickers Dustin Hopkins and Dan Carpenter were both in uniform for Wednesday's practice, although it was unclear if Hopkins was participating in the session.

Hopkins suffered a groin injury in Monday's practice, according to ESPN NFL Insider Adam Schefter, causing the Bills to sign the veteran Carpenter on Tuesday.

Both kickers, along with punter Shawn Powell and long-snapper Garrison Sanborn, emerged on the outdoor practice field toward the end of the media portion of the session. The specialists were likely practicing inside Ralph Wilson Stadium, so it is not immediately known if Hopkins was healthy enough to kick on Wednesday.

Meanwhile, defensive end Alex Carrington and right tackle Erik Pears both returned to practice Wednesday. The pair of starters had missed Monday's session with ankle soreness.

Cornerback Stephon Gilmore (fractured wrist) and offensive lineman Doug Legursky (knee) were the only two players not spotted.