Playing surface
Shape of the the thing they're chasing
Footwear
Size and shape of the wooden stick
Number of games in a season
Amount of standing around
Age of players
The whole net thing
Rules
Payroll
Stadium
And don’t forget if they so much as scrape the wall they are out for two weeks for injury, and look like a soccer player writhing on the turf from some terrible injury like you know a bruise maybe.