Zack Wheeler to begin rehab assignment Saturday

NEW YORK -- There is a light at the end of the tunnel for New York Mets right-hander Zack Wheeler.

Wheeler, who underwent Tommy John surgery in March 2015, is due to begin a minor-league rehab assignment on Saturday, general manager Sandy Alderson said.

Wheeler threw a simulated game on Monday in Port St. Lucie, Florida, as the final step before entering official games. His fastball sat at 90-93 mph, according to Alderson.

A rehab assignment lasts a maximum of 30 days, so Wheeler's return should come shortly after rosters expand on Sept. 1.

Wheeler suffered a pair of setbacks this year. Doctors performed surgery in April to remove an undissolved stitch from his original Tommy John procedure. And Wheeler required a cortisone injection in June for nerve irritation.