Inside MLB's process of authenticating game-used items
Briefly

Roki Sasaki's MLB debut against the Chicago Cubs involved his jersey showcasing a debut patch, which MLB intends to preserve as an iconic collectible. This patch will be paired with Sasaki's Topps Chrome Update Rookie Debut Card. Michael Posner, head of MLB's authentication team, emphasized the sport's historical significance, detailing efforts to ensure memorabilia accuracy. Beyond just the patch, MLB will collect various game items, including home plate and baseballs, to protect the integrity of memorabilia for fans and collectors alike.
This is a sport that is about history. Recording that history properly and knowing, 'This is the ball, the base, the bat,' that's what we're doing.
In addition to the debut patch, MLB authenticators will collect the pitching rubber, home plate, baseballs, jerseys, locker tags and lineup cards in Tokyo for auction.
When Tony pointed it out, everyone kind of looked at each other, like, 'Oh, this is a problem.' That led to the painstaking process of authenticating memorabilia.
Read at ESPN.com
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