Sanchez (back) threw off a mound Wednesday for the first time since straining a lat muscle in mid-June, Shi Davidi of Sportsnet reports. Sanchez threw for the first time last Monday, and reported being pain free. He has now progressed to the point of throwing off a mound, and should continue to advance his rehab assuming he doesn't suffer a setback. However, his role with the Blue Jays may return, as he may be moved to the bullpen. The initial plan involved Sanchez potentially closing out games, but that was derailed following a season-ending injury to Marcus Stroman. Marco Estrada and Matt Boyd could be slated to round out the rotation, while Sanchez may challenge for a closer role that's been a struggle for the club thus far.