BASEBALL American League * Minnesota Twins -- Signed Brad Radke (pitcher).
* Texas Rangers -- Placed Jack Daugherty (outfielder) on the 15-day disabled list.
National League * St. Louis Cardinals -- Extended the contracts of Dal Maxvill (general manager) and Joe Torre (manager) through 1993.
FOOTBALL (NFL) * Atlanta Falcons -- Signed Brian Mitchell (cornerback).
* Chicago Bears -- Signed Chris Zorich (defensive lineman) and Chris Gardocki (punter-placekicker).
* Detroit Lions -- Signed Otis Moore (defensive end).
* Kansas City Chiefs -- Signed Tim Barnett (wide receiver) and Eric Ramsey (defensive back).