49ers lose QB Garoppolo for season with torn ACL

Jimmy Garoppolo’s addition last season immediately turned around the fortunes of the San Francisco 49ers. Now the 49ers will have to go back to life before Garoppolo for the rest of the season.

The 49ers announced Monday that Garoppolo tore the ACL in his left knee while making a cut late in a loss at Kansas City, forcing him out for the rest of the season.

The injury deals a serious blow to the 49ers (1-2), who had planned their rebuild around Garoppolo and now must turn again to C.J. Beathard at quarterback.

San Francisco struggled with Beathard and Brian Hoyer last season before the midseason addition of Garoppolo changed their fortunes. San Francisco won the final five games in 2017 after Garoppolo took over as starter and the team rewarded him with a $137.5 million, five-year contract.

The 49ers will have to wait another year to earn dividends on that investment. Garoppolo got hurt in the fourth quarter of a 38-27 loss Sunday when he was scrambling toward the sideline and decided to cut up field instead of going out of bounds.

Garoppolo’s left knee buckled just before Kansas City cornerback Steven Nelson delivered a big hit, ending what was supposed to be his first full season as a starter after three games.

Cardinals

Rookie Josh Rosen will take over as Arizona’s starting quarterback this Sunday against Seattle. Rosen, the 10th overall pick in this year’s draft out of UCLA, replaced veteran Sam Bradford Sunday in a 16-14 loss to the Chicago Bears with 4:31 left to play after three Arizona second-half possessions ended in turnovers.

Browns

As expected, coach Hue Jackson named Baker Mayfield the team’s new starter just days after the No. 1 overall pick replaced an injured Tyrod Taylor and dazzled in his pro debut by rallying the Browns to a 21-17 comefrom-behind win against the New York Jets — Cleveland’s first victory since 2016.

Packers

Defensive lineman Muhammad Wilkerson had surgery on his left ankle after Green Bay’s loss Sunday at Washington and will be lost for the season.

Giants

Tight end Evan Engram’s MRI came back showing no significant ligament tears in his right knee. Engram’s injury was diagnosed as an MCL sprain.