[5] After initially impressing at the Avalanche's training camp, Mauldin was reassigned to AHL affiliate, the Lake Erie Monsters, to start the 2010–11 season.

[6][7] He was later called up by the Avalanche, and in his first game on November 12, 2010, he scored his first NHL goal, which was short handed, in a 5-1 road win against Steve Mason of his former team the Columbus Blue Jackets.

[8] Mauldin continued to make an impact with the Avalanche from the fourth line, most notably scoring two goals and two assists in a 7-4 victory over the Minnesota Wild on November 28, 2010, to be named first star of the game.

[10] A free agent, Mauldin returned for a second stint in Europe signing a one-year contract with HC Fribourg-Gottéron of the Swiss NLA on July 23, 2012.

[13] Mauldin continued his journeyman career, signing in the following summer to a one-year contract with Croatian club, KHL Medveščak Zagreb of the EBEL, on August 1, 2018.

[14] In the 2018–19 season, Mauldin produced 15 points in 23 appearances for Zagreb before opting to mutually conclude his contract mid-season to join Norwegian club, the Stavanger Oilers of the GET-ligaen on December 14, 2018.