"Obviously, I want to contribute a lot more than I have been," wide receiver A.J. Jenkins said Monday, via the Sacramento Bee. "So I'm going to make that happen and come back bigger, faster, stronger."
A first-round selection in the 2012 draft, Jenkins had zero catches and was active for only the final three regular-season games. He played just three snaps in the Super Bowl, according to the Bee.
Randy Moss is a free agent and said he doesn't know if he will be back in San Francisco. Ted Ginn Jr. also is a free agent. Mario Manningham and Kyle Williams both suffered season-ending ACL injuries, and while they both hope to return for the start of the season, that's still up in the air.
The 49ers liked Jenkins' route-running and soft hands enough while he was at Illinois to make him a first-round pick. Now they need him to work on getting stronger against press coverage and building a rapport with Kaepernick.
Follow Kevin Patra on Twitter @kpatra.