Dave Jacobs was playing second base and shortstop when he was with the 1961 Jacksonville Jets. However, back when he was with the 1954 Burlington-Graham Pirates, he was a first baseman. He is shown in the first baseman's pose in this photo from the April 25, 1955 issue of the Greensboro (NC) Daily News, when he was still with Burlington-Graham.
https://www.baseball-reference.com/r...d=jacobs001dav