JSA authentication #U19928 and U19929 for the autographs. Betts played for the Boston Red Sox. The item "Mookie Betts Game Worn Under Armour Signed Cleats Boston Red Sox JSA" is in sale since Saturday, March 23, 2019.This item is in the category "Sports Mem, Cards & Fan Shop\Game Used Memorabilia\Baseball-MLB\Other MLB Game Used Mem". The seller is "zanebats" and is located in Brentwood, Tennessee. This item can be shipped worldwide.