If the Los Angeles Lakers are going to crawl out of the hole they've dug for themselves with their current three-game losing streak, they'll have to do it without their All-Star big men -- center Dwight Howard and forward Pau Gasol -- who are both out indefinitely with injuries, the team announced Monday. Howard is sidelined with a torn labrum in his right shoulder while Gasol has a concussion. "It shouldn't keep me out for awhile, but to make sure that I'm cautious, to make sure that I'm healthy that's the most important thing," Howard told reporters at the Lakers practice facility after undergoing an MRI that revealed the tear earlier on…