Lewis (undisclosed illness) went 2-for-5 with a walk, two home runs and four RBI for Triple-A Reno on Sunday.
Lewis began a rehab assignment at Reno last week and is 6-for-23 with a double, three home runs and 10 RBI over five games. "He's pushing in the right direction. It's a matter of him building endurance," Arizona manager Torey Lovullo said. He'll return to Reno's lineup Tuesday after getting Monday off.