I agree with Russ. Swimming/hydro therapy has proven to
be very good for injury recovery and stamina building as well. I
personally tried it during my younger days for my knee ligament
injury, it works for me.
Basic hydro therapy exercise - walking in the baby pool up and
down. Go faster as you recover.
Wywy, dun rush into soccer so fast, you might agrivate the injury.
Be patient. 
