One week ago, Kerry Wood received a cortisone shot for the right shoulder that the Cubs finally admitted had been bothering him off and on since the beginning of spring training.Wood, who has declined to speak with the media, threw off the mound on Tuesday and is showing progress, though his return remains unclear.Everythings going good, manager Dale Sveum said before Wednesdays 5-1 loss to the Cardinals. He feels a lot better, so well just keep building that up. Were not putting any timetable on it.Were just going to make sure that hes ready to go when we activate him.The Cubs placed Wood on the disabled listfor the 16th time in his careerwith right shoulder fatigue retroactive to April 14.Wood has made four appearances this seasonthe last one on April 13and pitched 2.1 innings out of the bullpen. Sveum has mentioned the possibility of a minor-league rehab assignment.In theory, Wood could be available by Sunday in Philadelphia, which would give the Cubs the experienced setup guy their bullpen simply doesnt have right now. But theyre not going to push a 34-year-old reliever with this kind of track record.Itll be close, Sveum said. Im not going to say its going to be that exact day or not. We need to go out (and see him) throw his curveball off the mound and just really make sure that everythings good.