MILEPOSTS—FORMED: The professional WOMEN'S BASKETBALL ASSOCIATION, with six proposed franchises. The league is slated to begin play in 1975-76.
INDUCTED: Into the professional football Hall of Fame, ROOSEVELT BROWN, New York Giant offensive tackle (1953-65), GEORGE CONNOR, Chicago linebacker, offensive and defensive tackle (1948-55), DANTE LAVELLI, Cleveland end (1946-56) and LENNY MOORE, Baltimore halfback (1956-67).
SIGNED: TED MARCHIBRODA, to a three-year contract as head coach of the Baltimore Colts. For the past nine years he served as Coach George Allen's offensive coach with the Los Angeles Rams and Washington Redskins.
SIGNED: HARMON KILLEBREW, the fifth leading home-run hitter of all time, to a one-year contract with the Kansas City Royals. In his 21 years of baseball (14 with the Minnesota Twins) Killebrew has belted 559 homers and compiled a .514 slugging percentage.
DIED: BILL SPENCER, 26, from injuries occuring in a crash durng at preliminary race to the Grand National stock-car opener; at Riverside ( Calif.) International Raceway.
DIED: ALVARO PINEDA, 29, the second-leading jockey at the Santa Anita meeting, fatally injured when his horse reared in the starting gate; at Santa Anita Park, Calif.