Burton, 29, is 6-foot-4 and spent last season in the organization, playing for the Stockton Kings of the G League. He also signed a 10-day deal with Sacramento in late January, appearing in two games.
With Stockton, he averaged 12.0 points, 4.6 rebounds and 2.9 assists in 29 games. He has also spent time in the G League with the Maine Celtics and OKC Blue.
From 2018-20, Burton appeared in 71 games total with the Thunder. Before that, he played internationally for a season and was named Korean Basketball League MVP.
The Kings originally signed him in late September.
Comanche, 27, is 6-10 and has appeared in one NBA game — last season with the Trail Blazers. Like Burton, he is likely headed to the Stockton Kings, should each clear waivers.