Now that the Niners have locked up George Kittle, it’s Brock Purdy's turn. We talk with a salary cap specialist to get a sense of the deal.

NFL Network's Ian Rapoport reported on Tuesday that Kittle and the 49ers agreed to terms on a four-year, $76.4 million extension that will make him the league's highest-paid tight end. The 49ers entered the day with $39.4 million in cap space, not accounting for any potential changes to Kittle's cap number with his new contract.

The $76 million deal heading George Kittle's way is an important line in the sand for the San Francisco 49ers.