Following the significant losses of players due to injury and illness, including Brandon Aiyuk, San Francisco 49ers head coach Kyle Shanahan said he

The San Francisco 49ers lost their Super Bowl rematch to the Kansas City Chiefs on Sunday, 28-18, but they may have lost a lot more than just their fourth game of the season. Following the loss, 49ers head coach Kyle Shanahan told reporters the team is worried star wide receiver Brandon Aiyuk tore his ACL. Aiyuk will undergo more tests to confirm.

San Francisco 49ers wide receiver Brandon Aiyuk exited Sunday's loss against the Kansas City Chiefs during the first half after suffering a knee injury. He did not return to the game.