https://www.etsy.com/listing/1970489...tton-fabric-12
Could use something like this? I saw it when I was making DH a sports quilt. It's expensive but it does have the team logos. If this is no longer current, you might check with the seller to see what she may have.
I ended up purchasing cotton boxers and cutting them up for the fabric. They had his team logo and I used it here and there on the quilt so it was enough fabric.