Sorry we were not able to get back to you sooner.
You should always do what is reasonable to get to Mass. Sports activities are not really a sufficient excuse, at least in my opinion. I don't know about where you are, but in many places Mass is offered Saturday night when people are unable to make it on Sunday. Often, a more convenient Mass may be offered by another parish within a reasonable distance.
Check www.masstimes.com for details, however, if you are subject to your parent's decision to drive you, don't feel guilty yourself if you fail to convince them to take you to Mass.
I would express my desire to go to Mass and its importance to you, but if they refuse to take you, it's on them, not on you.