Underdog is a wonderful, albeit sharp problem that climbs directly out the cave (the Underdog Cave) below the staging area. This cave can also be located by the huge dead tree, which blew down in a windstorm in 1998 and now lies across the lip of the cave (walk the tree for a good sketchy time!)
Climb down into the bottom of the cave on the left side. Start with your hands on sinker, incut layaway flakes and move into a crimp/gaston for your left hand, off which you power to the dangling pebble (about the size of an apple).
Lock the pebble off and cruise up better holds to the bathtubs at the lip.
A thick T-shirt.
BETA PHOTO: The Underdog Boulder, correct me if I'm wrong.