This move signals that the Bears are worried about the status of tailback Armando Allen (knee), meaning Unga could see his first regular-season career action after Chicago spent a seventh rounder on him in the 2010 NFL Supplemental Draft.
The former BYU touchdown machine is still behind Matt Forte and Kahlil Bell in the pecking order, but with Forte nursing a sore ankle, there could be more carries to be had. Additionally, Bell could only manage 32 yards on his 13 carries against a Cardinals' defense giving up the fifth most rushing yards per game so Unga's path to touches could be clearer than most realize.
Unga compiled 3,455 rushing yards and 45 total touchdowns in his 41-game collegiate career. Ozougwu, the man he's replacing on the Bears' roster, has only played in two games for Chicago this season, recording two tackles in the process.