USC continues to shuffle roles on offensive line

LOS ANGELES — USC opened training camp last week with two options at center.
There was Nico Falah, a redshirt senior who started there for the final 12 games last season and proved dependable amid a Rose Bowl run. There was also Toa Lobendahn, a redshirt junior who started at center in the season opener. He tore a pair of ligaments in his right knee, causing him to miss the rest of the year.
Through four practices, neither Falah nor Lobendahn, two of the Trojans’ veteran linemen, has