FILE - San Francisco 49ers offensive tackle Trent Williams (71) looks on prior to an NFL football game against the Arizona Cardinals, in Glendale, Ariz., in this Saturday, Dec. 26, 2020, file photo. The San Francisco 49ers locked up their biggest potential free agent for the long term by agreeing to give star left tackle Trent Williams the richest contract ever for an offensive lineman. (AP Photo/Jennifer Stewart, File)SANTA CLARA, Calif. – The San Francisco 49ers locked up their biggest potential free agent for the long term by agreeing to give star left tackle Trent Williams the richest contract ever for an offensive lineman. “Trent’s a game changer,” said fullback Kyle Juszczyk, who signed a five-year contract to stay in San Francisco earlier in the week. Williams was graded as the top left tackle by Pro Football Focus and is now being paid that way as well.