Kansas City Chiefs quarterback Patrick Mahomes, the N.F.L.’s reigning most valuable player, had a magnetic resonance imaging test on his dislocated right kneecap on Friday, and the team said it was not sure how long he would be out but was preparing to go on without him for now.

“The kid had the M.R.I., and we don’t have all the information. That’s what I can give you,” Chiefs Coach Andy Reid said on Friday.

The Chiefs play Green Bay a week from Sunday, then face the Minnesota Vikings and the Tennessee Titans before a Monday night matchup against the Los Angeles Chargers on Nov. 18. The Chiefs (5-2) have their bye the next week, so they could possibly hold Mahomes out until Dec. 1 against Oakland.

Mahomes was hurt in a 30-6 victory in Denver on Thursday night while sneaking for first down on fourth-and-short deep in Broncos territory. Everyone jumped up from the pile but Mahomes, who quickly reached for his right knee as trainers rushed onto the field.