I have two bags, one main bag and a backup bag.
In the main bag, I put:
1
pr pants
1
pr shoes
2 shirts (micro-mesh and reg.)
1
pr socks...Thorlo uniform support socks
1 compression shorts (intera/coolmax/dri-fit)
1 undershirt (intera/coolmax/dri-fit...NEVER cotton)
1 Jacket
2-3 whistles...one on a noose, two on smitties
ball needle and miniature pump
1
pr extra laces
1 set of books: rules, case, off. manual, simplified, and handbook
association roster
game schedule
dry-erase pregame board
towel
bottle of liquid shower soap
deodorant
toothbursh/paste & mouthwash
Advil & Peptobismol tablets (never needed them yet)
small sewing kit
chapstick
gatorade + granola bars
In the backup bag:
1 each:
shirt
pants
shoes
socks
compression shorts
undershirt (coolmax/drifit/intera)
whistle/smitty
I leave this bag in the trunk of the car all season in case I tear or forget anything essential.