The Chicago Bears have agreed to a three-year contract with linebacker Jerrell Freeman, the team announced Saturday.
The deal is worth $12 million with $6 million guaranteed and $2 million more in incentives, a source told ESPN NFL Insider Adam Schefter.
Freeman, 30, led the Colts in tackles with 145 and 126 in 2012 and 2013, respectively, his first two seasons with the team. Injuries caused him to miss five games in each of the past two seasons, but he still was second in tackles (94 in 2014 and 112 in 2015).
Freeman, who has the ability to drop into coverage to defend tight ends, spent three seasons in the Canadian Football League before signing with the Colts in 2012.
Trevathan's deal is worth $24.5 million, with $12 million guaranteed, a source told Schefter.
The Bears also agreed to a two-year contract with defensive lineman Mitch Unrein and a one-year deal with receiver and return specialist Marc Mariani.
Unrein appeared in 16 games last season -- two for San Diego and 14 for Chicago -- and finished with 33 tackles. Unrein played for Denver from 2011 to 2014.
Mariani is returning for his third season with the Bears. He had 22 receptions for 300 yards, 29 punt returns for 192 yards and 16 kickoff returns for 418 yards last year.
ESPN Colts reporter Mike Wells and The Associated Press contributed to this report.