Khalil Mack exited with an elbow injury early in the second quarter against the Raiders, and the team confirmed it’s an elbow issue rather than a wrist/hand. He was carted off in a sling, raising fear of an extended absence after his $18 million, one-year deal this offseason. Tre Tucker supplied a seven-yard burst for Las Vegas as the Raiders held a 17-6 halftime edge. Without Mack, the Chargers must lean on depth to keep pressure on quarterbacks and weather the early-season setback.