Brandon Aiyuk of the San Francisco 49ers is hit by Trent McDuffie and Chamarri Conner of the Kansas City Chiefs during the second quarter at Levi's Stadium on October 20, 2024 in Santa Clara, California.

LATEST Oct. 21, 3:30 p.m. NFL Network's Ian Rapoport reported Monday that San Francisco 49ers receiver Brandon Aiyuk not only has a torn ACL, but a torn MCL as well along with "other damage" to his right knee. Niners head coach Kyle Shanahan confirmed the ACL and MCL damage in a conference call with reporters, and shared that Aiyuk would have season-ending surgery.

Oct. 20, 5 p.m. San Francisco 49ers head coach Kyle Shanahan told reporters after Sunday's game that the team fears Brandon Aiyuk tore his ACL in his right knee during the 28-18 loss to the Kansas City Chiefs.

"Not confirmed yet, but we'll find out for sure tomorrow," Shanahan said.

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