Compton spent all of 1912 in St. Louis, splitting time in left and right field and also logging 34 games as a pinch hitter.

According to legend, the real Lou Proctor was a telegraph operator who inserted his own name into the box score.

After playing just two games with the Terriers (both ends of a doubleheader on July 24), an injunction forced Compton to return to Kansas City; he was then sold to the Boston Braves in August, remaining there for the rest of the 1915 season.

The following year, the Braves sold Compton to the Pittsburgh Pirates in July, only to have Pete return to Boston 11 days later; he hit just .184 in the major leagues, but managed a .291 mark for Louisville.

After spending the entire 1917 season in the minors, Louisville sold Compton to the New York Giants in 1918, where he hit just .217 in 21 games; this would be his final big-league stop.