BASEBALL American League * California Angels -- Signed Floyd Bannister, pitcher, to a one-year contract.
* Texas Rangers -- Traded Scott Coolbaugh, third baseman, to the San Diego Padres for Mark Parent, catcher.
National League * Pittsburgh Pirates -- Signed Gary Redus, first baseman-outfielder, to a two-year contract plus an option year. Promoted Cam Bonifay from director of scouting to assistant general manager. Named John Sirignano assistant in the minor league and scouting department.
* St. Louis Cardinals -- Named Dave Bialas manager of St. Petersburg of the Florida State League.
BASKETBALL Continental Basketball Association * Cedar Rapids Silver Bullets -- Signed Ben Gillery, center. Placed Tony Martin, forward, on the injury list.
FOOTBALL National Football League * Atlanta Falcons -- Signed Gilbert Renfroe, quarterback; Rickey Royal, cornerback; and William Kirksey, linebacker, and placed them on the practice squad. Placed William Evers, defensive back, and Donnie Salum, linebacker, on injured reserve. Waived Todd Hammel, quarterback.