The veteran linebacker could miss the remainder of the regular season due to the right hamstring injury he suffered Sunday, according to the Chicago Tribune.
Urlacher, an eight-time Pro Bowl selection, reportedly has a Grade 2 hamstring strain. It's possible Urlacher will return for the regular-season finale against the Detroit Lions on Dec. 30, but Urlacher could be sidelined until the playoffs -- assuming the 8-4 Bears advance.
Though DeCicco played some middle linebacker when Urlacher was sidelined with a knee injury in training camp, he won't fill Urlacher's role going forward. The Bears finished Sunday's game with Nick Roach in the middle and Geno Hayes sliding into Roach's normal spot at strongside linebacker. A similar set up can be expected on Sunday against the Minnesota Vikings.
Urlacher isn't close to the player he was earlier in his career, but he remains a capable performer with obvious leadership abilities. The Bears are 7-15 in games without Urlacher dating back to his rookie season in 2000.
Follow Dan Hanzus on Twitter @DanHanzus.