Complex sentence: Defensively, he only appeared in three games as something other than an outfielder--in 1958, he was used in one game as a third baseman, and in 1960 he was used in two games as a second baseman.
Split into simpler sentences: Defensively, he only appeared in three games as something other than an outfielder. In 1958 he was used in one game as a third baseman, and in 1960 he was used in two games as a second baseman.