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. In the 2011–12 season, he made his long-awaited debut in the NHL as a 30-year-old in a 3-2 overtime victory against the Carolina Hurricanes on December 18, 2011. He was re-signed to a one-year, two way contract extension on July 1, 2012.\n', '

After three seasons within the Panthers organization, Rallo returned to the Texas Stars on a one-year AHL contract on August 1, 2014. 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. In the 2016–17 season with the Roosters, Rallo played on the top two scoring lines, finishing 5th in scoring with 25 points in 45 games as Iserlohn finished out of playoff contention. On March 3, 2017, it was announced that Rallo\'s contract would not be renewed.\n', '

On July 5, 2017, Rallo signed a one-year AHL contract in for his third stint with the Texas Stars. Limited to 29 games through injury in the 2017–18 season, Rallo completed his final professional year with 5 goals and 11 points.\n', '

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