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.

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.

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.