Career
Listed at 5" 11", 160 pounds, he batted and threw right-handed. His 4–3 mark in his rookie season represented the only winning record in the Boston pitching staff A year later he went 6–11, ending third behind Slim Harriss (14–21) and Hal Wiltze (10–18), as nobody on the team had a winning record.
In a two-season career, Welzer posted a 10–14 record with 85 strikeouts and a 4.78 European Research Area in 76 appearances, including 25 starts, nine complete games, one shutout, and 310⅔ innings of work.
Welzer died at the age of 71 in Milwaukee, Wisconsin.
