Rangers, Astros simply don't like each other, Texas
10 MLB Umpires Retire - Baseball Says Bye to 261 Years of On-Field Major League Umpiring Experience
Close Call Sports & Umpire Ejection Fantasy League: MLB to Debut Record 10 Rookie Umpires in 2020
Greg Gibson, The Home Plate Umpire, Retires After 25 Years of NL & MLB Baseball
MLB Rumors: Ted Barrett & Greg Gibson Among 10 Umpires Retiring
Yankees eliminated from playoff contention with 7-1 loss to Diamondbacks, Sports
SF Giants' Kapler will mix and match as NL adds designated hitter
Mariners win finale vs. Astros in extras
Gabe Kapler, SF Giants culture are the scapegoats for mediocrity - Sports Illustrated San Francisco Giants News, Analysis and More
Sources - 10 MLB umps retiring, most since '99 - TSN.ca
Baseball Umpires in 1921 – Society for American Baseball Research