As a matter of fact, of the 75% noted above:
Biological dads account for 26% (on accounta it's a direct reflection on the quality of their own genes).
Mom's current boyfriends generate 6% of said drama because they're sort of on probation.
Step dads are responsible for the least drama at 2% because, you know, they don't want to piss off the kid OR the mom.
And the majority of drama (66%) comes from when biological dad, step dad AND current boyfriend come to the same game (Jerry Springer usually can be found sitting with college scouts and cops tend to show up to those so bring popcorn).