SAN ANTONIO — The Oklahoma City Thunder’s depth, magnificent throughout this season and this Western Conference finals series, had no magic to give Sunday night. Depth went from a helpful tool to dire.Down Jalen Williams and Ajay Mitchell, two of the team’s most important creators, the Thunder delivered their flattest game of the postseason, a 103-82 Game 4 loss that evened their series with the San Antonio Spurs. A game that did not reek of desperation, but instead felt weighed down by the depth chart.Yes, the Thunder played without a bevy of ballhandlers at different points during this season. But this is not Detroit in February. Or Utah in November. Can the Thunder conjure offense against such a harsh defense without the necessary initiators?“We can,” coach Mark Daigneault said postgame. “I thought we left a lot to be desired on that end of the floor. We didn’t have the sharpness, force or precision necessary to crack them.”After Mitchell’s prominence in the Los Angeles Lakers series, OKC entered the West finals with roughly 3 1/2 star talents on the roster. But the injuries, as well as Chet Holmgren’s disappearance, have made the life of back-to-back MVP Shai Gilgeous-Alexander a lot more difficult than anticipated.Holmgren blossomed as a play finisher this season. He improved as a rebounder. He regained mobility after last year’s hip procedure. He rounded into stardom and made the All-Star team.In this series, though, he’s been quiet. Overpowered on the glass. Irrelevant in the offense. Incapable of launching his jump shot. Down in volume and attempts, which might not have been such an issue previously with OKC’s numbers but undoubtedly is now.In 26 minutes on Sunday, Holmgren tallied 10 points on eight shots. His mythical contemporary, Victor Wembanyama, produced back-breaking plays. He scrubbed the top of the backboard for several fast-break dunks. He vacuumed any trace of OKC momentum with a half-court heave to close the first half.