As announced on Monday afternoon, the team has placed two players on the active/physically unable to perform list—including starting tight end Tommy Tremble. The 25-year-old, who is entering his fifth NFL campaign, underwent back surgery in May and is expected to start his rehabilitation work during camp.

The Carolina Panthers will open training camp without three players - including their only punter. The team announced Monday that it placed tight end Tommy Tremble and wide receiver Dan Chisena on the active/physically unable to perform (PUP) list and punter Sam Martin on the active/non-football injury (NFI) list.

With NFL training camp season upon us, Michael Baca provides a refresher on the Carolina Panthers' roster changes, position battles and notable subplots.