I think it depends what happens to your blood sugars during the game.
If they have a tendency to fall, the advantage of a tubed pump is that you can remove it during the game and not worry about it.
If your blood sugars tend to rise, you will need to remain attached because, without your pump, you have no basal. Even the best pump belts and tape tacking run the risk of exposing the tube and getting it yanked with your shirt during a tackle so a tubeless pump located below your waistband is likely to be better for you.
However, this is all academic if you don't know what pumps are on offer at your clinic. My advice would be to find out what is available before setting your heart on anything.
Some clinics offer a choice of 4 or 5. Other pumps offer a "choice" of one.