It was during July of that season that Hallinan became too ill to play, which forced him to quit, but did return to the field later in August for the Indianapolis Blues. He was only able to participate in three games. Although he was a better than average hitter, he lacked skill in the field. For his career, he hit .287 in 170 games, but in his 111 games at shortstop, he totaled 161 errors for a .744 fielding percentage. He didn't fare much better in his games in the outfield or at second base, as his career total was .756. Early in his career, he spent most of his playing time at shortstop, but due to his lack of fielding skill, he was later moved to the outfield.