How the Pittsburgh Pirates sparked a uniform revolution in the 1970s - ESPN

Pirates' alternate uniform harkens to early '70s

Baltimore Orioles - Wikipedia

ESPN Stats] At 21 years, 240 days old, Julio Rodríguez is the youngest player in North American sports history to sign a playing contract worth $200M guaranteed. : r/baseball

[Rumor] Pirates to bring back 70s throwback uniforms for 2016 season to replace Sunday Alternates. : r/baseball

How the Pittsburgh Pirates sparked a uniform revolution in the 1970s - ESPN

The Good, the Bad, & the Ugly: Pittsburgh Pirates by John McCollister, Steve Blass - Ebook

How Upper Deck did the '70s

Byron Buxton Homes, Sonny Gray's Pitches 6, Minnesota Twins Beat