In Geneva, N.Y., at 81. Prior to his retirement, Mr. Theriault had worked for 28 years in the special services division of the Seneca Army Depot in Romulus, N.Y. During World War II, he served with the Army's 203rd Field Artillery and saw action in France and Germany; his decorations included the Bronze Star and the Purple Heart. Active in baseball throughout his life, Mr. Theriault had been a Little League organizer in Geneva and a scout for the Cincinnati Reds. Prior to World War II, he had played semiprofessional baseball and football with the Portland (Maine) Sagamores of the New England League; following the war, he was drafted into the Brooklyn Dodgers' organization. A star three-sport athlete at Cheverus High School, Portland, Maine, Mr. Theriault was a pitcher for two seasons at Holy Cross. In 1981, he was inducted into the Maine Baseball Hall of Fame.