Conor Sullivan begins his second professional season and first with the ThunderBolts in 2017. He signed on May 23, 2017. He played for the Joplin Blasters in the American Association in 2016 and appeared in 23 games behind the plate. Sullivan attended Ave Maria University in Florida and played four years there between 2012 and 2016. He hit .281 over 197 total games, including a career-best .325 as a junior in 2014, the same year he posted a .795 OPS. He also hit three home runs in each of his final two years. Prior to Ave Maria, Conor played his high school ball at Brother Rice High School in Chicago, Illinois.