From late 2012 to early 2015, Coleman played Tyreese on AMC's post-apocalyptic horror series The Walking Dead. In the third season, Tyreese was a recurring character. Coleman was upgraded to series regular and main cast member at the start of the fourth season and retained this status for its fifth season until his character was killed off in the mid-season premiere. On November 20, 2014, he was announced to play Fred Johnson, a.k.a. "The Butcher of Anderson Station", a former Marine caught in a power struggle between Earth and Mars on the Syfy science-fiction series The Expanse. Coleman has taken on a main role in the 2015 series, and returns in Season 2.