"There are a few other things involved," Cutler said. "If I just had a normal high ankle sprain, I wouldn't be in a cast. (A cast) helps it scar up and stuff, but the normal high ankle sprain isn't really a concern at this point."
McCown has played well in Cutler's place this season, but Trestman continues to downplay the possibility that Cutler's No. 1 spot on the depth chart is in jeopardy.
"It's not going to change," Trestman said. "Jay is the quarterback of our football team and Josh is our backup, and all three of us know that."
McCown has posted a 100 passer rating with five touchdowns and no interceptions in four games this season, including two wins as a starter.
Some other injury news from around the league Monday:
- NFL Media Insider Ian Rapoport reported Monday that the Denver Broncos believe free safety Rahim Moore will miss several games with an injury to his lower leg, according to a person briefed on the injury. Broncos interim coach Jack Del Rio said Moore had a lateral compartment syndrome, which required surgery Monday. Moore's exact timeline to return is unknown. Mike Adams replaced Moore in the lineup Sunday night.
- Vikings defensive back Josh Robinson will miss at least four to six weeks after suffering a fractured sternum in Sunday's loss to the Seattle Seahawks, Minnesota coach Leslie Frazierannounced Monday. Vikings center John Sullivan also suffered a concussion and will be subject to the league's concussion protocol.