Colts don't have set starter to replace LB Jerrell Freeman

Jerrell Freeman, who had 296 tackles in four seasons, is leaving the Colts to sign with the Chicago Bears. Darron Cummings/AP Photo

INDIANAPOLIS - The Indianapolis Colts lost their third 2015 starter since the start of free agency when linebacker Jerrell Freeman agreed to a three-year, $12 million deal with the Chicago Bears on Saturday.

But unlike at tight end and safety, where Dwayne Allen and Clayton Geathers are expected to replace the departed Coby Fleener and Dwight Lowery at those positions next season, the Colts don't have a set starter at inside linebacker to move into Freeman's spot.

The Colts signed Nate Irving to a three-year deal last offseason thinking he would be their starting inside linebacker if they couldn't re-sign Jackson or they decided to release veteran D'Qwell Jackson.

That still might be the case with Irving, but he has to prove he can stay healthy first. He only played in eight games last season because of knee and wrist injuries.

Another internal option to replace Freeman is Sio Moore, whom the Colts acquired in a trade from Oakland last season. He had four tackles and appeared in 12 games.

With the draft next month and the start of free agency just days old, the Colts will be looking for linebackers.