Despite the comments above -- you are 20 and you are doing a sport that is cardio-intensive. I think the thing here is to stay w/ what works for your goals. If you want to gain some more mass, take a look at your diet & see about maybe adding some more protein & carbs if you need the energy for all the cardio you do. Cardio is catabolic after a certain point, so its hard to make gains. Also remember that your natural test levels are starting to kick in big time, so if you were interested in getting "bigger" or at least tighter -- you could adjust your diet & throw in some more training for growth to counter the cardio.
Either way -- you are off to a great a start! Good luck!