Leaman had been a broadcaster at the school the last nine seasons. He was stricken in Washington after working Saturday's game at Richmond, the university said.
Leaman became coach at Massachusetts in 1966, compiling a 217-126 record in 13 seasons. He guided the Minutemen to eight Yankee Conference titles and six NIT appearances. A two-time New England Coach of the Year and member of the New England Basketball Hall of Fame, Leaman's team included players Julius Erving, Rick Pitino and Al Skinner.
Born in Boston in 1932, Leaman played at Boston University, leading the Terriers in scoring and assists in each of his three seasons. He was the captain of the 1959 team when it advanced to the NCAA East Regional final.