[1] Singler attended South Medford High School, where he was the 2009 OSAA 6A State Player of the Year after averaging 21.8 points, 10.8 rebounds, 5.0 assists, 1.4 blocks and 1.0 steals per game as a senior, helping the Panthers to a 21–8 record and a sixth-place finish at the OSAA Class 6A tournament.

[11] On November 13, he made his season debut for Idaho in a 110–106 loss to the Rio Grande Valley Vipers, recording 20 points, five rebounds, two assists and three steals in 36 minutes.

[8] On March 11, he made his debut for Raptors 905 in a 102–98 win over the Iowa Energy, recording 12 points, two rebounds and three assists in 27 minutes off the bench.

[16] On November 27, 2017, Singler signed with German club s.Oliver Würzburg for the rest of the 2017–18 BBL season.

Singler had signed with the Canterbury Rams in February 2020 for the New Zealand NBL season,[21] but was unable to join the team due to the COVID-19 pandemic.

[22] On June 13, 2021, he scored 41 points on 16-of-16 shooting to go with seven rebounds, nine assists and three steals in a 103–85 win over the Taranaki Mountainairs.