The Diamondbacks reinstated Lewis (illness) from the 10-day injured list Monday and optioned him to Triple-A Reno, Steve Gilbert of MLB.com reports.
Lewis is evidently over the undiclosed illness which has kept him sidelined since early April. However, the Diamondbacks decided they don't have a spot for him on the major-league club right now, so he'll remain in Reno, where he had been on his rehab assignment.