Celebrate Ryan Mountcastle's unforgettable debut with the Baltimore Orioles with this Autographed Baseball. It features Mountcastle's signature and a "MLB Debut 8-21-20" inscription, commemorating his first game in the big leagues. Obtained under the auspices of the Major League Baseball Authentication Program, this baseball can be verified by its numbered hologram at MLB.com.
Celebrate Ryan Mountcastle's unforgettable debut with the Baltimore Orioles with this Autographed Baseball. It features Mountcastle's signature and a "MLB Debut 8-21-20" inscription, commemorating his first game in the big leagues. Obtained under the auspices of the Major League Baseball Authentication Program, this baseball can be verified by its numbered hologram at MLB.com.
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