The San Francisco 49ers' fears about the injury to rookie defensive end Mykel Williams were confirmed Monday afternoon when a source told ESPN's Jeremy Fowler that Williams tore the anterior cruciate ligament in his right knee.

Add defensive end Mykel Williams to the lengthy 49ers injury list, as the rookie first round draft pick sustained a torn ACL Sunday in a 34-24 road win over the New York Giants.

San Francisco 49ers rookie Mykel Williams reportedly confirmed to have suffered a torn ACL, which will end his season.

San Francisco 49ers defensive lineman Mykel Williams will miss the rest of the season after the first-round pick was diagnosed with torn ligaments in his right knee.

49ers head coach Kyle Shanahan confirmed on Monday that rookie Mykel Williams suffered a torn ACL, per ESPN’s Jeremy Fowler. Williams left Sunday’s game against New York during the final minutes. He initially entered the blue medical tent before slowly being led back to the locker room.

Kraft’s injury drew reactions from across the NFL, including Packers linebacker Micah Parsons, who posted a photo of the two together on his Instagram stories shortly after reports of the torn ACL surfaced, accompanied by several sad emojis.

Williams, the Niners’ first-round pick (No. 11) in April, was injured late in the fourth quarter of Sunday’s win over the New York Giants at MetLife Stadium, with San Francisco leading by 17. Coach Kyle Shanahan said after the game that the team feared Williams had torn his ACL. Testing on Monday confirmed the diagnosis, the source said.

Follow along with the latest NFL news, injury updates and more as we turn our attention toward the trade deadline and Week 10.