I'm eating at a caloric deficit right now, losing fat and some weight (186 to 182), gaining strength and endurance.
Doing crossfit workouts 6 days a week.... Many pullups, squats, deadlifts, overhead presses, dips, lunges, snatches, cleans, jerks, overhead squats, burpees, erg rows, etc... I'll throw in a regular bodybuilding day every couple of weeks or so to switch it up a bit.
Staying roughly the same "size" (42" chest remains) but the waist has trimmed a LOT (from 34.5 to 32 and dropping). This is perfect for now as I just want to get lean while gaining strength and stamina but still being able to fit in my clothes (had to taken in my jackets and pants at the waist, but at least I'm not buying a new wardrobe).
For the OP, to build leg strength without a ton of mass, you should try doing long rep sets of body weight squats (20-30 reps per set) thrown in after other exercises, relatively low weight snatch and clean olympic lifts, and box jumps. /bro science
I honestly haven't looked into any of the latest sport science and methodology regarding workouts. I just do the crossfit (at my regular gym, I don't buy into that whole xfit lifestyle) and have been MORE than pleased with the results compared to ANY other workout style and regimen I've tried.
*edit* take this as a "you should probably listen to other more well informed poasters"