Custom on-field style jersey. Everything is sewn on, size XL. Hand-signed by Sammy Sosa. Samuel Kelvin Peralta Sosa (born November 12, 1968) is a Dominican American former professional baseball right fielder. Starting his career with the Texas Rangers, Sosa became a member of the Chicago Cubs in 1992 and became one of the game's best hitters.The lot / autograph(s) includes an official James Spence Authentication (JSA) hologram and matching COA for authenticity purposes.Authentication: JSA COA