OKLAHOMA CITY -- Thunder star Jalen Williams will miss Game 7 of the Western Conference Finals against the San Antonio Spurs, according to the latest injury report. Depth is a hallmark of this Oklahoma City team, but they'll be missing two of their three best playmakers in the do-or-die affair on Saturday night at the Paycom Center. Ajay Mitchell also remains out for the Thunder. The injuries deal a devastating blow to the reigning champions at a critical point in their title defense, with 48 minutes of basketball to decide if it's them or the Spurs who will represent the West in the NBA Finals. Williams missed most of OKC's playoff run with a Grade 2 hamstring strain, and returned for the double-overtime Game 1 of the Western Conference Finals before leaving Game 2 early. He gave it a go in Game 6 in San Antonio, but looked hobbled and rough in his 10 minutes off the bench. He finished with one point and two turnovers in the 27-point loss.…