It was an easy victory got the Kansas Chiefs on Thursday night against Denver, but an injury to Quarterback Patrick Mahomes ruined any celebrations.
Mahomes, last season’s NFL MVP, went down in agony during an offensive pile-on in the second quarter and faces “at least” three weeks out.
The 24-year-old will undergo a scan to determine the extent of the injury.
After the game, Mahomes tweeted: “Everything looking good so far.”
Chiefs coach Andy Reid said he “didn’t know how serious the injury was”.
“We’re good with whatever direction this thing goes,” he added.
The Chiefs, who brought in veteran Matt Moore, 35, to replace Mahomes, now have a nine-day break until they host the Green Bay Packers on 27 October.