Denny Sullivan (third baseman)

Dennis J. Sullivan (June 26, 1858 – December 31, 1925) was an American utility player in Major League Baseball, playing mainly as a third baseman for the Providence Grays (1879) and Boston Red Caps (1880) of the National League. A native of Boston, Massachusetts, Sullivan attended Boston College and College of the Holy Cross. Listed at 5ft 9in, 170 lb., he threw right-handed (unknown batting side).

In a six-game career, Sullivan was a .261 hitter (6-for-23) with six runs, three RBI, and two doubles without home runs. He made six appearances as a third baseman (4), catcher (1) and left fielder (1), and was a member of the Providence 1879 National League champions.

Sullivan died at the age of 67 in his homeland of Boston, Massachusetts.