Greg DeFotis (December 8, 1951) of the Chicago area is an FIDE Master and USCF Senior Master last rated at 2462. DeFotis won the first Illinois High School Students Chess Championship back in 1966 and won or tied for first in the US Junior Championship three times.
In the 1972 U.S. Closed Championship, he tied for sixth with William Lombardy in a very strong field, scoring +3 =9 -1 and the following year he tied for first in the US Open. With a score of 10-2, Norman Weinstein won the title on tiebreaks. Others tied at a score of 10-2 in order of tiebreaks were: Walter Browne, Duncan Suttles, DeFotis and Ruben Rodriguez.
Unfortunately, DeFotis gave up chess around 1994 to take up bridge and backgammon as a "pro" because he could not make the money in chess. In 1975 DeFotis was a member of the bridge team that won the national championship.
In the following game from the 1972 US Championship De Fotis crushes Bisguier with two nice positional sacs.