Nike Boston Red Sox Grapefruit League Spring Training Dri Fit T Shirt MLB XL. Official Nike MLB Authentic Collection Performance Apparel.  Athletic Fit. Size XL. 2018 but in original plastic bag with tags attached. ( Opened one for photos).Dry Anti-odor with Dry-Fit technology.  The Authentic Collection  is what the players wear on the field,  per tag. Thanks for looking!