If you believed the Cubs were jinxed, just wait until you hear this: Ryan Dempster has a broken right big toe, suffered when he jumped over the dugout fence to celebrate Sunday's win over the Brewers, reports the Chicago Tribune. The right-hander was placed on the 15-day disabled list Tuesday, and though he said he'd miss only his two scheduled starts this week plus one after the All-Star break, manager Lou Piniella said trainer Mark O'Neal put Dempster's timetable at closer to three to four weeks, which might cost him 6-7 starts. Carlos Zambrano moved up to start on three days' rest Tuesday with Kevin Hart promoted from Triple-A Iowa to start Wednesday's game. Depending on how Hart fares, he might get a longer look in the rotation. Current relievers Sean Marshall and Jeff Samardzija could be future candidates if Hart isn't up to the task.