Sedlak, 24, will miss approximately six weeks due to an ankle injury suffered in Monday's practice. He has notched nine goals and six assists for 15 points with 29 penalty minutes and is +8 in 70 career NHL games with the Blue Jackets, including posting 2-0-2 with four penalty minutes in eight contests this season. The Ceske Budejovice, Czech Republic native made his NHL debut with the club in 2016-17, recording 7-6-13, 25 penalty minutes and was +10 in 62 games. Columbus' seventh-round selection, 158th overall, in the 2011 NHL Draft, Sedlak has added 28-20-48 with 83 penalty minutes and was +22 in 149 career AHL games with Lake Erie and Springfield.

Hannikainen, 24, has skated in three games with the Blue Jackets this season and has added 0-1-1 and a +1 plus/minus rating in two contests with the Monsters. He picked up 1-1-2 and six penalty minutes in 10 games with Columbus and collected 19-18-37, 22 penalty minutes and was +6 in 57 games with Cleveland in 2016-17. The Helsinki, Finland native has registered 1-1-2 and six penalty minutes in 17 career NHL games with the Jackets since making his NHL debut in 2015-16 and has added 26-32-58, 42 penalty minutes and a +13 plus/minus rating in 109 career AHL games with the Monsters. He was originally signed to an entry level contract by the Blue Jackets on April 20, 2015.