The 2018-19 season is the final guaranteed year of the contact Singler signed in July 2015. It will pay him $5.3 million next season.
As Singler moves into the final guaranteed year of the deal — the 2019-20 season is not guaranteed — the Thunder has more realistic options with that contract than in the past.
A trade is more viable this summer, given that a new team would be on the hook for only one season of Singler's salary. A team looking to open cap space in the summer of 2020 could consider taking Singler in a deal.