Is this a bad idea to wear to open gyms/tryouts?

Its not that bad. I mean saying you were on the Harver team and they beat the eastern team it looks good like i was on a better team but i think ill like it here. and showing off the volleyball experience is good as long as the warm up shirt has something where its obvious that it was for volleyball otherwise its not a great idea. I would try and find a volleyball shirt that doesnt show a rival team so prominently. do you have a shirt or something from like a camp or anything? If not id still wear the other team just to show experience and such! Good Luck!!! Hope this helped!!