Just a left field Q here, all the sport shots have the players OOF and the still background sort of OK.
Try manual settings with a ss of 1/1000, and f8 with auto ISO, no higher than 2000.
Program your camera to back button focus and I suspect your keeper rate may improve.
I also think the pictures that you started with are too heavily cropped for the facial features to be sharp. If you want portraits, get closer.