Lawrence got injured late in the fourth quarter when LT Walker Little was pushed back, causing Lawrence's ankle to be stepped on. Lawrence tried to get up but went down to his knees, slamming his helmet on the ground in frustration.
Coach Doug Pederson said Lawrence is unlikely to require tightrope surgery, which is what Steelers QB Kenny Pickett underwent for his high-ankle injury. The Jaguars will monitor Lawrence for the rest of the week and won't put an official timetable.
Veteran quarterback CJ Beathard is Jacksonville's backup and would be in line to start on Sunday against the Browns in Cleveland. Beathard completed nine-of-10 passes for 63 yards and led the drive resulting in a game-tying field goal to force overtime.
The Jaguars will definitely be without WR Christian Kirk, who suffered a groin injury on the first offensive play of Monday night's game. Pederson said Kirk needs surgery and will miss some time.
Jacksonville is 8-4 and in first place in the AFC South, but the Texans (7-5) and Colts (7-5) are lurking behind them.