Following the dissolution of Chivas USA, Spangenberg signed with the New England Revolution ahead of the 2015 season. He was then sent on loan to the Richmond Kickers, a USL team who is partners with MLS club D.C. United.[4] Spangenberg was released by New England at the end of their 2015 season.[5]
Puerto Rico FC
Spangenberg became the second goalkeeper signed by NASL expansion club Puerto Rico FC on April 6, 2016.[6]
After 10 matches in the 2016 fall season Trevor Spangenberg was given the chance to start at goalie against the league leaders FC Edmonton on the road. He and the team was able to keep the game scoreless. After a spectacular performance against Miami FC the job was his to keep. The 25-year-old keeper had a goals allowed average of 1.2 and five shut outs in 12 starts.[7]
On January 23, 2017, Puerto Rico FC announced the return of five regulars from the 2016 starting XI. Spangenberg performances towards the end of the season led to his option being picked up by the club.[7] He was released at the end of the 2017 season.[8]
Richmond Kickers
On February 28, 2018, Spangenberg signed with USL side Richmond Kickers for the 2018 season.[9]