San Diego optioned Weathers to Triple-A El Paso on Monday, Jeff Sanders of The San Diego Union-Tribune reports.
Weathers allowed four runs over 5.2 innings in a loss to the Dodgers on Sunday, and he'll head back to El Paso to continue work as a starter and stay on rotation. The Padres haven't announced a corresponding transaction yet, but it appears Drew Carlton could be joining the San Diego bullpen before Monday's game against the Royals.