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Jimmy Garoppolo likely tore ACL in 49ers’ 38-27 at Kansas City

49ers quarterback Jimmy Garoppolo injured his knee on this play in the fourth quarter Sunday against the Chiefs. The 49ers fear he may have torn his ACL.

49ers quarterback Jimmy Garoppolo injured his knee on this play in the fourth quarter Sunday against the Chiefs. The 49ers fear he may have torn his ACL.

Photo: Charlie Riedel / Associated Press

KANSAS CITY, Mo. — The 49ers have endured more humiliating losses in Kansas City than the one they endured Sunday, but none more devastating.

In a September defeat that felt, in some ways, like the end of their season, they fear they lost franchise quarterback Jimmy Garoppolo for the season with a torn ACL in a 38-27 loss to the Chiefs at Arrowhead Stadium.