Alex Tosi

Alexander Vincent Tosi (born March 7, 1988) is a Canadian-born American Major League Baseball umpire. He made his first appearance at the Major League level in 2019 and was promoted to the full-time umpiring staff for the 2023 season.

He wears uniform number 66.

Career Tosi began umpiring while playing high school baseball. He made his professional debut in June 2011 in State College, Pennsylvania in the short-season New York–Penn League. He made his first ejection when State College Spikes manager Leo Gómez bumped him during an argument and then tore third base out of the ground. He made his full-season debut the following season in the Midwest League.

Tosi was home plate umpire for the Houston Astros combined no-hitter against the New York Yankees at Yankee Stadium on June 25, 2022.

The following year, Tosi was assigned to the National League Wild Card Series between the New York Mets and the Milwaukee Brewers. He worked home plate for game one of the series.

Personal life Tosi was raised in Peoria, Illinois, and graduated from Dunlap High School in 2006. He played NCAA Division III baseball as a pitcher at Illinois Wesleyan University and was a part of the 2010 National Championship team his senior year. He received a degree in finance.

During the minor league offseason, Tosi worked in the finance department of Case New Holland’s Racine, Wisconsin, office.