I AM WARHOL
Veteran
With four minutes left in the fourth quarter, the Spurs had a six-point lead and 85.9 percent win probability. That dropped to 39.2 percent three and a half minutes later before becoming 1.2 percent with six seconds left in regulation.
It happened in Game 4, too. San Antonio led by 14 points at the open of the fourth quarter, giving it a 74.4 percent win probability, but the Spurs lost that game as well. Per Elias, San Antonio has already lost as many playoff games when leading by at least 10 points in these playoffs (two such losses) as the team did in the entire 2015-16 regular season.
To say this is a stunning development is underselling it. The Spurs led the league in defensive rating, allowing 96.6 points allowed per 100 possessions, putting them on par with the Bill Russel-led Boston Celtics in the 1960s. Yet the Thunder has taken control of the series, driving the Spurs net rating down from plus-11.4 in the first quarter to minus-31.4 in the fourth. In other words, San Antonio degrades into a version that is three times worse than the Los Angles Lakers were during the regular season in the span of 48 minutes.
It's cause they're supporting cast is

OKC is too big, young and athletic. This late in the series on 2 days rest it's gonna take a miracle