These cards are from the Topps Stadium Club and Base League series, representing his time in Major League Baseball (MLB). 

As a standout player in the sport, Ken Griffey Jr is highly regarded as a Hall of Famer and Greatest Of All Time (GOAT) in baseball. 

These cards are a unique piece of memorabilia for fans and collectors, showcasing Griffey Jr during his illustrious career in the MLB World Series.