The Padres placed Chris Young on the disabled list Saturday and called up Tim Stauffer from Triple-A Portland to start Sunday in Houston.
Young left the game against the Rockies on Tuesday with a strained oblique muscle. The 28-year-old Young leads the major leagues with a 1.82 ERA.
Manager Bud Black said the team expected the right-hander to recover within two weeks.
Padres Place Chris Young On 15-Day DL