SPEED SKATING—At the U.S. Olympic Trials in West Allis, Wis., ERIC HEIDEN broke his own 1,000-meter world record by .62 with a time of 1:14.37.
MILEPOSTS—FIRED: As a result of the controversy over University of New Mexico basketball players obtaining phony credits. Coach NORM ELLENBERGER, 47, who had been suspended by the school on Nov. 30.
Baltimore Coach TED MARCHIBRODA, 48, after two successive 5-11 seasons. He had led the Colts to AFC East titles in each of his first three years (1975-77).
Pepper Rodgers, 48, as Georgia Tech football coach. The Yellow Jackets were 4-6-1 in 1979 and 34-31-2 in Rodgers' six seasons.
HIRED: As coach of the Bengals, FORREST GREGG, 46, who coached Toronto of the CFL to a 5-11 record in 1979. He replaces Homer Rice, who was fired following Cincinnati's second straight 4-12 season.
NAMED: LPGA Player of the Year for the second year in a row, NANCY LOPEZ MELTON, 22, who won a tour-record $215,987 and nine tournaments.