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49ers fear QB Garoppolo sustained season-ending ACL injury

KANSAS CITY, MO - SEPTEMBER 23: Head coach Kyle Shanahan of the San Francisco 49ers and the team training staff examine quarterback Jimmy Garoppolo #10 on the sideline after being hurt on a play during the fourth quarter of the game against the Kansas City Chiefs at Arrowhead Stadium on September 23rd, 2018 in Kansas City, Missouri. (Photo by Peter Aiken/Getty Images)

KANSAS CITY, Mo. (AP) — The 49ers fear quarterback Jimmy Garoppolo will miss the remainder of the season after sustaining an injury to the ACL in his left knee late in Sunday’s 38-27 loss to Kansas City .

Garoppolo will have an MRI to confirm the severity of the injury, but 49ers coach Kyle Shanahan said “we fear an ACL.” That would mean C.J. Beathard is in line to start at quarterback.

The 49ers also lost star cornerback Richard Sherman to a calf injury, the third defensive back to get banged up in the game.

Garoppolo was 20 of 30 for 251 yards with two touchdowns and no picks against the Chiefs, and he was at his best in trying to rally the 49ers late. But after driving for a potential score in the fourth quarter, Garoppolo was flushed from the pocket and headed for the sideline.

He appeared to take an awkward step and his knee buckled, just as Chiefs cornerback Steven Nelson delivered a shoulder-to-shoulder blow. Garoppolo wound up leaving on a cart.

San Francisco wound up kicking a field goal for the final margin.

Sherman left the game in a walking boot, and will have an MRI Monday to determine the extent of his injury.