Marlins starting pitcher Henderson Alvarez's next step is joining the rotation, though exactly when that will happen is still up in the air. 

"He's going to be on his way," manager Mike Redmond told the Miami Herald Saturday. "He'll throw a bullpen here tomorrow and we'll figure out what we're going to do as far as where we're going to fit him in."

Alvarez, who has been out all season with a shoulder injury, made his final rehab start Friday and is lined up with Ricky Nolasco's spot in the rotation, set to come Wednesday. Nolasco has been the subject of trade rumors in the final season of his contract, so that is a likely landing spot. 

Alvarez threw 24 1/3 innings over four rehab appearances, allowing just three runs with 15 strikeouts and one walk. 

"Everything I've heard has been really positive, how he feels, his arm strength and the way he's pitched," Redmond said. "Each rehab start he's improved."