[3] Tribbett signed with United Soccer League club Harrisburg City Islanders on March 24, 2015.

[7] Originally brought in as depth, Tribbett started the first match of the season against FC Dallas due to impressing in preseason and other roster injury concerns.

Most of his time would be individual loans spells to Bethlehem Steel FC where he would make 12 appearances and scored once.

[11] Tribbett returned to Harrisburg joining USL side Penn FC on March 2, 2018.

[13] USL side Nashville SC announced they had signed Tribbett for the 2019 season on November 28, 2018.