I did the same thing, as soon as I read green screen, I jumped to the player's edges to look for the cast. Nice job!
On the team photo, overall, I like it. I try and do team photos with my son's baseball and basketball teams (he is 10). In large part because of the work you have shared here . I completely suck at posing them and having an overall vision/plan.
I am assuming that the post between #14 and #22 is part of the bleachers, as the grates are on the sides? Have you tried to clone that out? The post and the shadow it's casting on the wall seems to draw a lot of attention for me at least. I would say attempt the grates on the sides too, but that may be a bit more difficult as they are also in the floor reflection.