An already-optimistic Alfonso Soriano told Cubs trainers Tuesday that he'll be ready to return from the disabled list this weekend after completing his first day of running in the outfield since he was injured Aug. 5. ''I told him I was going to put him in there today,'' manager Lou Piniella said. ''He'll play on top of the Coke bottle out there [behind the left-field bleachers]. He'll be Chicago's version of Bernie the Brewer.'' As ''exciting'' as the workout was for the injured leadoff hitter, who had been swinging in the batting cages for several days, Piniella said the team is sticking to its Labor Day time frame for Soriano's return. Tuesday was the first day he was eligible to be activated.