India, Dec. 8 -- Indianapolis Colts quarterback Daniel Jones exited Sunday's Week 14 matchup against the Jacksonville Jaguars after suffering a potentially serious right-leg injury in the second quarter. Backup quarterback Riley Leonard took over in his place.

Anthony Richardson, the Colts' starting quarterback earlier this season, remains on injured reserve. He sustained a broken orbital bone in a freak pregame accident during warmups before the Week 9 game against the Arizona Cardinals in late October. A resistance band pole snapped and struck him near his eye, requiring surgery to repair the fracture. The injury temporarily affected his vision.

As of early December, head coach Shane Steichen confirmed Richardson has not been medicall...