Seattle Mariners Personalized Custom (Add Name & Number) 100% Cotton T-Shirt Replica Major League Baseball Jersey Personalized Custom (Add Any Name & Number) Official MLB Cotton Crewneck T-Shirt Replica Major League Baseball Seattle Mariners Jersey After your purchase, email us through Amazon with the name and number you would like on the Jersey. Customized Jerseys are for Mariners Fans & Players. Volume Discounts for teams and leagues are available. Your Personalized Custom Majestic Jersey is an Official Major League Baseball Replica Jerseys with Screenprinted Authentic Mariners MLB Logo