Ryan Blair Additon
- Height 6' 4", Weight 210 lb.
Befoer the 2022 season, he was promoted to MLB's full-time umpiring roster. he had already accumulated 381 games of major league experience at that point. Among these games was being the home plate umpire for Corey Kluber's no-hitter on May 19, 2021 as part of what was basically a ful schedules of major league games, even though he was still officially classified as a AAA umpire.
He is the brother of minor league pitcher Nick Additon. The two have appeared in the same game in the minors on various occasions.