[3] The Flames traded Mikkelson to the Tampa Bay Lightning on January 6, 2012, in exchange for forward Blair Jones.

[5] On July 19, 2013, Mikkelson left the Lightning organization as a free agent and signed a one-year, two-way contract with the Pittsburgh Penguins.

[6] He was assigned to Pittsburgh's American Hockey League (AHL) affiliate, the Wilkes-Barre/Scranton Penguins, for the duration of the 2013–14 season and registered a professional best 30 assists and 38 points in 73 games.

[8] After a successful lone season in the DEL helping Adler claim the championship, Mikkelson signed a one-year contract in the neighbouring Austrian Hockey League (EBEL) with EC Red Bull Salzburg on June 18, 2019.

[10] On May 21, 2021 it was announced that Mikkelson would be playing for the Cardiff Devils of the Elite Ice Hockey League (EIHL) in the 2021–22 season.