The San Diego Padres placed starting pitcher Shawn Estes on the 15-day disabled list Friday and recalled Cassidy from Triple-A Portland to take his roster spot. The 30-year-old right-hander was on the opening day roster, but was optioned to Portland after Monday's win over the Giants to make room for catcher Rob Bowen. He has yet to pitch for the Padres. (Updated 4/7/2006)