A jersey is not a big deal. It's just a piece of material that players wear.
Training jerseys are even less of a big deal. They serve just to soak up sweat and don't even look good.
But to some people, a jersey is a huge deal. Like the person who got a jersey from Iker Cassilas for her brother who is in a wheelchair. And it was such a big deal that she cried.
Sports are awesome.