From the report:
This is great news. Before his surgery, Sanchez was a top prospect. He was originally projected to be a starter, but he could be a big help in the bullpen. Him and Mark Melancon could be called up by mid-season, and should provide a big boost.
"It's going well," Sanchez said. "So far, so good. We're on the right track. Hopefully there are no setbacks."
Sanchez, who had surgery April 18, could be ready for minor league games in May.