Turnovers are up. The Thunder leads the league in giveaways at 17.1 per game. That rate, coupled with the meager assists numbers, has given the Thunder a league-worst 1.07 assists-to-turnover ratio. Furthermore, the Thunder is second-to-last in turnover differential, turning it over 2.7 times more than its opponents on average.
Deficient defensive rebounding. By allowing 12.5 offensive rebounds per game, the Thunder is in a three-way tie for 29th with Golden State and Sacramento in defensive rebounding. It's been a problem all season, as OKC has at least 14 offensive rebounds 13 times while holding opponents to less than 10 only twice. Defensive rebounding ranks right up there with turnovers as the Thunder's most significant weaknesses.
Opponent field-goal attempts. Opponents have attempted more field goals than Oklahoma City in a staggering 25 of 29 games. The Thunder has watched teams out-shoot it by 7.5 shots on average and get up a whopping 84.9 attempts per game. Those numbers tie back to the turnovers and defensive rebounding issues. When you factor in OKC's inability to limit opponent scoring opportunities, it really is amazing that the Thunder still sits atop the Western Conference standings.