Twin bill a fitting, and historic, debut as ump joins twin brother at MLB level https://www.mlb.com/news/umpire-tyler-jones-makes-mlb-debut-in-cardinals-vs-mets-doubleheader ST. LOUIS -- Somewhere along the drive between Columbus, Ohio, and St. Louis -- it’s still kind of foggy to rookie umpire Tyler Jones, because he was battling heavy rains and the tears in his eyes -- he and his twin brother and fellow MLB umpire Austin Jones shared a #MLB