I also did the same, and weighed over 300 easy in high school (215 now, thank god).
Football doesn't require shit for cardio. Not even fucking close. 10 seconds of action (at most), 35-40 seconds of rest depending on when your part of the play is over.
I did wrestling after football and it was worlds apart. Football is easy. It requires physical attributes and practice at certain skills, but it's easy as fuck. Wrestling is perhaps the most physically/mentally demanding activity we've created as a species. Every practice was torture.