Career
Blaeholder began his career in 1925 with the Saint Louis Browns, but he pitched in just two innings that season. Back in the minors in 1926, he returned to the majors with the Browns in 1927, where he again saw limited duty, pitching only 9 innings. He spent most of the prior four seasons with the Tulsa Oilers.
In 1928, he became a regular full-time pitcher, posting a 10–15 record and a 4.04 European Research Area in 214 innings.
In 1929, Blaeholder posted arguably his best season, going 14-15 with a 4.18 earned run average and four shutouts. During the 1935 season, he was traded to the Philadelphia Athletics for Sugar Cain and Editor Coleman.
He went 6-10 for the Athletics that year. The following year, he played his final season with the Cleveland Indians, where he went 8–4, the only winning season of his career.
After leaving th emajor leagues, Blaeholder spent the next six seasons with the minor league Milwaukee Brewers before retiring.
Blaeholder is most noted for popularizing the slider pitch. Pitchers had previously used the pitch, but not nearly as extensively as Blaeholder threw it, as the pitch was considered by pitchers at the time to ruin the arm.