Good to see you are branching out into other sports. Two main areas to work on are framing tighter by quite a lot, especially on the earlier shots, and shot from a lower position. Framing tighter is going to have a few advantages, you will get a shallower dof, more detail in the players and less distraction of the surroundings. Generally shooting portrait orientation is best but for a shot like the 3rd you would be better served by landscape.
Also in shots like the 4th, it seems as if the main player is OOF and the focus is on the player behind, possibly the case in the 2nd to last as well.