I will add that in the fall, you will probably need baseball pants and a ball cap. From my sons experience, Uniforms were not handed out till the team was decided. In fall he used his own Baseball pants and cleats. A ball cap from HS or a Summer team. what ever he had handy. And whatever Dry fit shirt was clean.
Once the team was decided and cuts were made Uniforms and hats would be supplied. He still used his own Pants for practices through out his college career.
This probably pertains more to D3 and NAIA than other levels.