UMPS CARE AUCTION: 2014 World Series Game Used Umpire Shirt signed

Even the Umpires Approve of Carlos Santana's Approach at the Plate - The New York Times

Rosenthal: An umpire, the son he lost, and the memorabilia that binds them - The Athletic

AL remains a royal pain for NL, wins All-Star tilt again, Sports

Here's What Happened When We Tried To Play Moneyball Without Any Money

Baseball in the United States – Travel guide at Wikivoyage

Dom Amore: From Andy Baylock's intro course in umpiring at UConn, Jim Reynolds, Dan Iassogna have risen to rank of MLB crew chief – Hartford Courant

MLB-Affiliated UMPS CARE Charities Online Auction Includes Signed Items

Sports, Definition, History, Examples, & Facts

Who Will Benefit from the MLB Layoff as the 2020 Season Starts? - The New York Times

Robert Edward Auctions - The Premiere Sports Auction House