This controversial pitcher closed off opportunities for women umpires for decades by opening his big mouth.

Card 151 on Beckett - https://marketplace.beckett.com/baseballcardconnection_794/item/1988-topps-151-bob-knepper_34326495

SABR Bio by David E. Skelton - https://sabr.org/bioproj/person/bob-knepper/

Hall of Fame Card Corner - https://baseballhall.org/discover/card-corner/1989-topps-bob-knepper

Where did all the Bobs go? -

https://www.mlb.com/cut4/where-did-all-the-bobs-in-baseball-go-c301633434

"Careless and Insensitive" -

https://www.upi.com/Archives/1988/06/18/Houston-Astros-pitcher-Bob-Knepper-who-called-the-National/7331582609600/

Knepper apologizes -

https://www.efootage.com/videos/108045/knepper-statement-sexist-comments

Bob in the SI Vault -

https://vault.si.com/vault/1988/06/20/some-say-no-leica-astro-lefty-bob-knepper-has-a-decidedly-controversial-focus-on-the-world-but-his-pitching-this-year-is-right-on-target

https://tht.fangraphs.com/tht-live/25th-anniversary-pitcher-misses-perfecto-in-debut-by-one-pitch/

Article about Female Umpires - https://baseballhall.org/discover-more/stories/baseball-history/woman-in-blue