Harley Parnell Hisner (born November 6, 1926 in Maples, Indiana) is a former starting pitcher in Major League Baseball who played briefly for the Boston Red Sox during the 1951 season. Listed at 6' 1", 185 lb., he batted and threw right-handed.
In his only game appearance, Hisner posted a 4.50 ERA with three strikeouts - two of them being against Mickey Mantle - and four walks in six innings of work. He was the losing pitcher and never appeared in a major league game again. In that same game, Hisner gave up Joe DiMaggio's last regular season hit.