The former Gophers standout was recalled by the Minnesota Wild on Wednesday, and is set to make his NHL debut on Thursday, when the Wild host the Toronto Maple Leafs.
A Hobey Baker Award finalist during his final season with the Gophers, Reilly racked up 42 points in 39 games for Minnesota, while ranking third nationally in power play scoring with 21 points.
Reilly became a free agent last summer despite being drafted by the Blue Jackets in 2011, taking advantage of a little-used loophole that gives NHL teams a four-year window to sign college draft picks.
Once a player like Reilly leaves school after those four years are up the team has 30 days to sign him before he becomes a free agent.
The Wild took advantage in July, signing Reilly to a two-year contract.
Minnesota also announced that fellow defenseman Christian Folin has been reassigned to Iowa.