Wow, didn't see that one coming. This doesn't guarantee anything though. Quote from Theo:
"We met today at his request," Epstein said. "It went well. He expressed a strong desire to be a Cub (again) and an even stronger desire to have a strong 2012 season. He's in great shape. He's working out twice a day, pitching down in Venezuela. I told him that we'd let him earn his right back to being a Cub."
"Most of the details will stay confidential," Epstein said. "But there are steps he needs to take to earn his way back. If he does so, we will see him in spring training and welcome him back."