After the Seahawks defeated the Redskins 24-14 in the NFC Wild Card Round, Williams and Sherman had a brief verbal exchange before Williams punched the outspoken cornerback in the face.
The feud seemed to have been settled at least by July 2015, when the two stars appeared together at a Nike event.
When the 49ers acquired Williams from Washington on April 25, Sherman joked about wanting a "rematch" on Twitter.
Given the lofty expectations that San Francisco will have next season coming off a 13-3 record and an appearance in Super Bowl LIV in 2019, having two star players on the same page seems like a good thing for the franchise.
Williams will step in as the 49ers' starting left tackle in the wake of Joe Staley's retirement. The 31-year-old made the Pro Bowl in seven consecutive seasons from 2012-18 as a member of the Redskins. He held out last season because of differences with Washington.