Mostert discussed what the moment meant to him during a conversation with NFL Network.
"He came up to me after the game, and down the tunnel," Mostert said. "We talked, and he was just like, 'Hey man, I'm so proud of you.'"
In a video of the moment, as other 49ers players headed to the locker room, Williams could be heard saying the following to Mostert: "We came a long way, you hear me? Man, I love you, bro."
"We've been through a lot," Mostert continued. "We both have the same journey, both being undrafted guys. I played with him in Miami, and he was always overlooked. ... So was I, and that's why we had a great bond. I told him, 'Man, look, it's your moment. I hope you win MVP,' because he played lights-out."
Williams didn't end up winning the MVP award for the game. That honor went to quarterback Patrick Mahomes, who also helped engineer the Chief's late fourth-quarter comeback.
"I was proud of him," Mostert added. "I was so happy that he was able to get that championship ring. And as far as the jersey goes, yeah, we swapped jerseys, but I eventually gave it back to him because I understood the importance of that jersey. He's going to cherish that jersey for a long time.
"It was very important that we both got our jerseys back. It was a great gesture by both of us that we swapped jerseys, not thinking anything else, and that's just what happens when you love one another. That's my brother. I will do anything for him."
More San Francisco 49ers News
-
49ers' Ricky Pearsall eager to strengthen bond with Brock Purdy in offseason
San Francisco 49ers wide receiver Ricky Pearsall didn't have much opportunity to build chemistry with quarterback Brock Purdy during his rookie season. The first-year player faced setbacks from injuries during training camp, and just as he was recovering and preparing for the... -
49ers' Kyle Shanahan discusses Brock Purdy's injury, Joshua Dobbs 'high level' of play
The San Francisco 49ers appear to have dodged a bullet. In a season where not much has gone right for the defending NFC Champions, the team received some good news earlier this week regarding quarterback Brock Purdy's elbow injury. On Monday night against the Detroit Lions,... -
49ers plan to release Javon Hargrave, keep Deebo Samuel; Trent Williams 'committed' to return
During the San Francisco 49ers' end-of-season press conference, general manager John Lynch confirmed that Javon Hargrave's time with the team will likely end. The 49ers plan to release the defensive tackle with a post-June 1 designation to ease the impact on the salary... -
49ers fans will love Deommodore Lenoir's reason for expecting to miss next year's Pro Bowl
Deommodore Lenoir was one of four San Francisco 49ers players selected as alternates for this year's Pro Bowl. However, the cornerback didn't shy away from expressing his frustration with the selection process. Taking to social media, he wrote, "Are we Watching Film or going...