Here is the design I came up with for your basketball tourney. Since you will be going on black shirts, white ink is a must (it goes under all the other colors as an underbase). I also included a blue and orange, making it a 3-color design--plus allowing the black garment to come through in parts of the design gives it a great 4-color look. I think this would look and sell great on all kinds of apparel (it is clean enough for both screen printing and embroidery!) I included your required logo as well :)
Let me know if you would like to see any color variations or possible changes made, and I will be happy to work with you on it. Thanks!
Also, it should be noted that you will need your design to be flat colors in order for silkscreening on shirts to work. Thus, the logo you see here is a flat 3-color only design. Let me know if you would like to see one that is more detailed and touched up for web use, and I will be happy to provide an alternate option. Thanks again!
Thanks for the quick feedback; very much appreciated. Here is the other one in the colors that you liked better. This way you can show them both and see which people prefer. Also, in case you may not be fully aware--if your contest happens to hit judging and you still wish to see more variations, you can have your top-ranked designer still submit new versions. Thanks again.