It depends what team and who signed it.
I have never heard baseball caps called that but there is a line of baseball caps marketed by New Era that are called '59FIFTY'.
Baseball...
mark has 61 melinda has 54
Melinda has 54, Mark has 61.
CAPS-R-US
Baseball caps have quite a large market. You can purchase baseball caps from buckwholesale.com. I would also suggest looking at alienexpress.com for wholesale baseball caps as well.
I know stickers can be fun to collect. Also bottle caps, seashells, stuffed animals, rocks, gem, stamps, and playing cards.
Men want to buy baseball caps with team logos on them.
Stocking caps, baseball caps, almost any hat will do.
Straw
Straw
If you join his club at thechrisbrownfanclub.com you would have a chance at meeting him. IN the club you get signed baseball caps and maybbe even a call form him. It in 29.55 per mo.