Indianapolis placed outside linebacker John Simon on the injured reserve list in a corresponding transaction. The Colts announced the moves on Tuesday.
Johnson entered the NFL as an undrafted free agent signing by the Miami Dolphins in 2014. The LSU product was signed to the Colts' practice squad on Nov. 7. He had 13 tackles in 18 career games during stints with the New York Jets, New England Patriots, Washington Redskins and the Dolphins. The 6 foot 2, 295 pound defender also has one fumble recovery and one start in his NFL career.
The defensive lineman spent the first six weeks of this season on the Jets' active roster. He appeared in 11 games in 2016 for the Patriots and Jets, logging a dozen tackles. Johnson, 24, had one tackle in seven games during his 2014 rookie campaign.
Simon had nine starts this season and tallied 42 tackles, three sacks, a pass defensed and an interception for the Colts. He signed with the team on March 10 as an unrestricted free agent. Simon has 151 tackles, 13 sacks, four passes defensed, a forced fumble, a fumble recovery and an interception for a touchdown in 54 games for the Colts, Houston Texans, and Baltimore Ravens. He was a fourth round pick by the Ravens in the 2013 NFL Draft.