The New York Giants offensive line is in trouble. The team announced Wednesday that guard/tackle David Diehl will undergo surgery Wednesday to repair his unstable right thumb. Diehl's injury will cost him approximately six weeks. Starting center David Baas sprained his MCL and is out 2-4 weeks, which already forced some shuffling on the line. First-round pick Justin Pugh is now practicing with the starters, with guard Kevin Boothe moving to center.