Early career

Carroll played in his native Ireland with Wilton United, also playing both football and Gaelic football with Ballincollig until he was 16-years old, before joining the Cork City academy.^[2] He appeared on the bench for Cork's senior team in 2012, before going on loan to College Corinthians in the Munster Senior League.^[3] A spell at Carrigaline United in the Munster First Division followed in 2013, who he helped to promotion.^{[citation needed]}

College in the United States

In 2014, Carroll was recruited by Martin Methodist College in Pulaski, Tennessee and offered a scholarship. In his first game at Martin Methodist, Carroll dislocated his knee and requires surgery.^[2] He played 20 games in 2015, scoring five goals and was named First Team All-Southern States Athletic Conference.^[4]

Carroll transferred to Davenport University in 2016, where he went on to make 55 appearances over three seasons, scoring eight goals and tallying two assists.^[4] In 2016, Carroll was named First Team All-Wolverine Hoosier Athletic Conference, 2017 saw him named GLIAC Defensive Player of the Year and First Team All-GLIAC whilst helping the Panthers to the GLIAC championship, and was named on the D2CCA All-Midwest Region first team.^[4]

In 2016, Carroll played with amateur side Muskegon Risers.^[5]

Detroit City

In 2017, Carroll made the move to amateur side Detroit City FC, who at the time competed in the NPSL.^[5][6][7][8] He remained with the club through to 2020 in the NPSL, as well as their spell in the NISA, winning numerous titles with the club, being named captain in 2019.^[9][10]

On 10 January 2022, Carroll was re-signed by Detroit as they made the move to the fully professional USL Championship.^[8] On October 14, 2023, Carroll, along with teammates Nate Steinwascher, Connor Rutz, and Maxi Rodriguez were honored as "City Centurions" for playing in at least 100 games with the club.^[11]