Yankees fall to A’s again as CC Sabathia exits with knee injury

The Yankees are on their way to the postseason. It’s becoming less and less certain that CC Sabathia will be able to join them there. The left-hander exited Friday’s 8-2 loss to the A’s after just three innings and 48 pitches with what the team called “right knee discomfort.’’ No tests were scheduled, according to…