Azumah Nelson of Ghana retained his World Boxing Council featherweight title with a 12-round split decision over Marcos Villasana of Mexico Tuesday night in Inglewood, Calif. BASEBALL

Boston Red Sox -- Said RHP Roger Clemens, who had shoulder surgery Aug. 30, has agreed to one-year deal, reportedly for more than the $140,000 he received in 1985. New York Mets -- Said 1B-OF Tim Corcoran, released last December by the Philadelphia Phillies, signed a Class AAA contract. BASKETBALL

Portland Trail Blazers -- Said C Sam Bowie, who has played only three games since Jan. 10, will probably undergo surgery next week to repair a stress fracture of his left shin bone. COLLEGES

Southern Conference -- Announced Gay Elmore, high-scoring forward for Virginia Military Institute, has been named the conference's basketball player of the year. FOOTBALL

St. Louis Cardinals -- Reported Hank Kuhlmann, 48, a former assistant with the Green Bay Packers and Chicago Bears, has been named running backs coach. Tampa Bay Buccaneers -- Said Jim Stanley, who coached the Michigan Panthers to the USFL championship in 1983, has been named defensive coordinator. STEEPLECHASE

Rappahannock Hunt point-to-point races scheduled for Saturday have been postponed until April 27 because of ground conditions. LOCALLY

Chuck Hinton, former player for the Washington Senators, will conduct a baseball clinic under the sponsorship of the D.C. Recreation Department Saturday in the Wilson High School gymnasium, Nebraska and Chesapeake avenues NW.