Wacha will start Monday's game against the Royals, Kevin Acee of The San Diego Union-Tribune reports.
Wacha was originally scheduled to face the Dodgers on Sunday, but the right-hander will be moved back to Monday with Ryan Weathers getting the ball in his absence. The Padres are committed to giving their starters extra days of rest whenever possible, and Wacha will gain added rest with his outing moved to Monday against the Royals.