Boeckel reached career highs in several offensive categories in 1921. He batted .313 with 10 home runs and 84 RBI. He also registered 20 stolen bases, nearly matching his career high of 21 steals. In 1922, Boeckel struggled with a toe injury. He aggravated the injury during the following preseason, but a newspaper report at the time called him "a mighty fine ball player when the veteran is right." A collegiate player named Arthur Conlon briefly challenged Boeckel for the third base position in 1923, but Conlon's play fizzled and Boeckel remained the starter.