Very dubious assertion. If the Jazz win out they finish at 46-36. OKC would have to finish 10-5 to get the 8th seed (Jazz would win tiebreaker).
OKC remaining schedule has 8 games vs top teams (Dallas (2), Atl, SA (2), Mem, Hou, Port), 3 moderate games (Mia, Phx, Bos), 3 easy (SAC, IND, LAL) and Utah.
Assuming the Jazz win-out, if we assume OKC wins 3 easy games, 2-1 against moderate and 4-4 vs top teams, they finish at 9-6 and Jazz take the 8th spot. This is not at all unlikely. To support, Hollinger predicts a 9-6 finish.
The path is easier versus Suns and NO.
So if the Jazz win-out, I'd estimate that they would have about a 50% or better shot at the playoffs.
((All that said, this is all hypothetical as the probability of the Jazz winning out is probably <1%, but that is a different discussion altogether.))