BASEBALL Houston Astros -- Signed Manager Hal Lanier to an extension through 1989; agreed to terms with OF Billy Hatcher for 1988. Kansas City Royals -- Signed OF Danny Tartabull for about $300,000, ending holdout. Montreal Expos -- Signed 1B Andres Galarraga. St. Louis Cardinals -- Signed LHP Greg Mathews, LHP Joe Magrane. San Francisco Giants -- Signed 3B Kevin Mitchell for $237,500, 2B Robby Thompson for $232,500. Seattle Mariners -- Agreed to terms with 2B Harold Reynolds, SS Rey Quinones.

ARENA FOOTBALL New England Steamrollers -- Named Vito (Babe) Parilli head coach.

HOCKEY Montreal Canadiens -- Re-signed Canadian Olympian RW Serge Boisvert for rest of season. New York Rangers -- Signed U.S. Olympic RW Tony Granato, sent him to IHL Colorado. Winnipeg Jets -- Signed U.S. Olympic D Guy Gosselin, multiyear contract. Boston Bruins -- Signed Canadian Olympian LW Bob Joyce, multiyear contract.

COLLEGES MEAC -- Named Howard F Vannessa Graham women's basketball player of the week. Brown -- Herb Hammond, 36-114-3 in six seasons, resigned as hockey coach. Virginia -- Clarissa Cantacuzene was named collegiate polo player of the year in the third annual Polo Magazine Excellence Awards.

JURISPRUDENCE King County (Wash.) -- Seattle Seahawks reserve QB Gale Gilbert was charged with indecent liberties for allegedly fondling a woman, 24, he met at a nightspot. He pleaded innocent, as he did Feb. 22 in an alleged incident involving another woman, 21.

INDOOR SOCCER Baltimore Blast -- Welcomed F Ted Hantak, American Indoor Soccer Association's No. 4 scorer last year with Memphis, to practice and is set to sign him to MISL contract.