I get that the operative word is 'responsible.' But just for fun, you left out:
Jewelry: Anywhere from 50 to 200K on this.
Clothes: Anywhere from 25K to 150K.
Party Expenses: Anywhere from 50 to 100K and up. The nightclubs they go to have bottle service and VIP sections. 5 grand is a typical tab in those places with groups involved. It adds up fast. Add wining and dining women to this total as well.
Entourages: Easily a 100 to 300K experience. Even if bills get passed around on the party nights with players, they still have plenty of broke friends who aren't kicking in for anything. Trips, gifts, "loans."
Investments: I'll leave this out, but I'd guess pro athletes get burned on investments at a high percentage.
I can't imagine an 800K guy is only dishing out 45K in child support, but that's whatever. Factor in several cars, not just one, gambling, vacations, money to the family. Toss in a divorce and it's pretty easy to see how pro athletes suddenly find salaries of 5mil straining the pocketbook.