How would you get big by doing a "shit load of cardio"? I am doing cardio now and I can guarantee that I won't grow much while in the process of doing "a shit load of cardio".
To clarify, I am only bringing this up because I see many people with very little muscle on their frames jumping on the treadmill daily. That's fine if you are trying to lose weight. Overdoing cardio has never put size on anyone.
Either way, bugs answered you. Nearly all athletes have an off season where the focus is either more strength, more size or both.