Hey Topsy - your stats sound identical to me.. I've varied from 62kg, up to 90kg (and then got sick and lost 12kg in 6 weeks
). I'm currently bulking starting at 77kg at the start of this year and sitting about 79/79.5kg now. Also, like you I have soccer (instead of AFL) training once a week, play soccer on Saturdays and then play either indoor soccer or touch another day per week.
I imagine that you would struggle with a full body routine because it's hard to do 3 full body sessions a week (both having 8-10 sets of leg exercises) and not be sore/fatigued for game day on Saturday.
For that reason, I think it's better to do M-Lower, T-Upper, W-Rest (hopefully basketball is on Wednesday nights or training
), T-Lower, F-Upper, S-AFL/soccer game, S-rest.
After years of pathetic BB.com isolated splits, I now do this sort of split instead. It means you hit your body parts twice a week and you're still able to move lower body workouts away from game day (and mid-week sport to a lesser extent).
Honestly, I would just google 4 day upper/lower split and look for either one on muscle and strength or do Lyle McDonald's generic bulking routine. It works.
Otherwise, see previous comments re eating/lifting. Oh and consider making your breakfast a huge shake (i.e. add in peanut butter, oats, egg whites/protein, berries - it helps with getting the kind of calories you need to grow).