NFL reporter Dianna Russini is standing by her reporting about George Kittle's contract dispute with the San Francisco 49ers, despite the All-Pro tight end publicly refuting what she's said. Kittle and the Niners are currently negotiating a new deal for the 31-year-old as he's entering the final year of his contract.

George Kittle did not participate in the first day of the 49ers' voluntary offseason program, but he is denying a report that he is in a contract dispute with the team.

After a rough down year for the San Francisco 49ers last season, Kyle Shanahan's bunch is (understandably) looking for a major rebound to contention this fall. Such a rebound will likely require everyone in the 49ers' core to be on the same page and working as one.