In 1929, Willoughby led the Phillies in both wins (15) and ERA (4.99).[3] He also walked the most batters in the National League.[4]
Willoughby pitched poorly the following season, surrendering 241 hits and 68 walks in 153 innings pitched, which resulted in a 7.59 ERA and a 4–17 win–loss record.[2] On November 6, 1930, he was traded to the Pirates, along with shortstop Tommy Thevenow, for shortstop Dick Bartell.[4] Willoughby pitched in just nine games for Pittsburgh, after which his major league career ended.[5]
Later life and death
After his professional baseball career, Willoughby moved back to Kansas, where he pitched for a semipro team located in Chanute in 1938-39 and managed a team in Independence in 1940-41.[6] He worked as a pump mechanic, and moved to McPherson, Kansas in 1948, where he died on August 14, 1973.[7]