NFL Draft decisions await deep group of USC underclassmen

LOS ANGELES — Toa Lobendahn knows the risk.
Knee injuries, each requiring surgery because of torn ligaments, ended his previous two seasons.
This fall has mostly come with a clean bill of health. Lobendahn, USC’s left tackle, has missed only one game, a loss at Washington State in late September, because of a skin infection. His knees have held up.
But that could change. A chance of re-injury has been a central thought as Lobendahn, a redshirt junior, weighs returning for his final s