Mat Latos' shoulder injury is serious enough that the Padres' ace right-hander will open the 2011 season on the disabled list.

The team, though, doesn't expect him to be there long.

"He's turned a corner on this thing," manager Bud Black said Monday. "Our medical staff feels good about where this is."

Latos' injury, which has been diagnosed as bursitis, will be dated retroactively to March 22. If he's healthy, he could be activated April?6, the team's second home game against the World Series champion Giants.