Gibson makes final call: MLB umpire retires after 24-year career, Sports
MLB Umpires Association, adamant that crews are simply upholding rule, address home-plate collision rule in statement - ESPN
World Series umpires have youth - The Iola Register
Umpire Placement Course
Gary Cederstrom, Mike Winters to be umpire crew chiefs in LCS - ESPN
New Pace of Play Rules and Umpiring Staff Announced - West Coast League
MLB Sets Umpire Crews For 2022 AL and NL Championship Series — Inside the Seams
Gibson makes final call: MLB umpire retires after 24-year career, Sports
Bill Miller (umpire) - Wikipedia
World Series Ump Crew Youngest in Years, Nod to K-Zone Tech
Porter, Johnson become MLB's 2nd, 3rd Black ump crew chiefs - The San Diego Union-Tribune
2023 AL and NL League Championship Series Umpire Roster Announcement
World Series umpire delivers flawless performance during Game 2
Umpire Crew Announced For Triple-A All-Star Game
MLB umpire Eric Cooper dies at 52; did playoffs 2 weeks ago