Undrafted, Rallo played two seasons with the Texas Stars before he was signed to a one-year contract by the Florida Panthers on July 2, 2011.

[2] After three seasons within the Panthers organization, Rallo returned to the Texas Stars on a one-year AHL contract on August 1, 2014.

[3] After two years playing for the Stars, he decided to venture to Europe, signing on a one-year contract for the German club, Iserlohn Roosters of the Deutsche Eishockey Liga on August 12, 2016.

[6] Limited to 29 games through injury in the 2017–18 season, Rallo completed his final professional year with 5 goals and 11 points.

Having played 12 professional seasons, Rallo announced his retirement in accepting an assistant coaching role with the Milwaukee Admirals of the AHL on July 12, 2018.