Frank Duffy (baseball)
 Frank Thomas Duffy (born October 14 1946) is a former professional baseball shortstop. He played all or part of ten seasons in Major League Baseball from 1970 to 1979 for the Cincinnati Reds San Francisco Giants Cleveland Indians and Boston Red Sox.Duffy is probably most remembered for being a part of what is considered a lopsided trade between the Reds and Giants. On May 29 1971 Duffy was traded along with pitcher Vern Geishert for young outfielder George Foster.