Chiefs receiver Maclin goes down with knee injury

Kansas City Chiefs wide receiver Jeremy Maclin (19) lies on the turf after he was injured during the second half. (Tony Gutierrez/AP)

Chiefs wide receiver Jeremy Maclin left the field in tears on a cart after injuring his right knee in the third quarter and Texans All-Pro J.J. Watt is questionable to return because of a groin injury.

There was no immediate word on the extent of Maclin’s injury. He missed the entire 2013 season because of a torn right ACL.

Maclin also suffered the same injury at Missouri four years before the Philadelphia Eagles drafted him in the first round in 2010. Maclin had 87 catches for 1,088 yards and eight TDs in his first season with the Chiefs.

Watt limped off the field earlier in the third quarter but returned. He came off again on the same play Maclin was injured, went to the locker room and was cheered when he came back to the sideline.