Professionally, he was a member of the Carolina Cobras of the National Arena League (NAL) before joining the Memphis Express of the Alliance of American Football (AAF).
[5] In his freshman year in 2013, he appeared in ten games (starting seven), during which he recorded 32 catches for 315 yards and two touchdowns.
In the season opener against Notre Dame College, he caught 13 passes for 247 yards and a touchdown, with the first two categories leading all receivers across the NCAA's divisions that week.
[6] During a 45–21 defeat to Concord, Guerra garnered media attention with a one-handed catch over two Concord defenders, a play that Fairmont State head coach Jason Woodman called "possibly the best he had ever seen";[7][8] the feat appeared on ESPN's SportsCenter program as one of the weekend's top ten plays.
[9] He was subsequently named first-team All-MEC,[10] and was also a member of Beyond Sports Network's third-team All-Atlantic Region.
[11] Guerra's senior campaign saw the Fighting Falcons open the 2016 season 7–0, their best start since 1967, during which he set the school's all-time receptions record.
[17] He eventually made the Express' final roster for the 2019 AAF season,[18] becoming one of two Memphis players who attended an NCAA Division II school along with fellow receiver Reece Horn.
After the AAF suspended football operations, Guerra was activated from the league suspension list by the Destroyers on April 6, 2019.
[24] After the CFL canceled the 2020 season due to the COVID-19 pandemic, Guerra chose to opt-out of his contract with the Alouettes on August 26, 2020.