Cael Sanderson said Nagao had "a major surgery" and won't return "anytime soon."
Cross has only played in five games over his three-year career.
Lanning spoke about Penn State, Tyler Warren, and more in a 30-minute Zoom call.
Winning the Big Ten Championship could mean earning a No. 1 overall seed for Penn State football.
While the Nittany Lions clinched a spot in the Big Ten Championship, some former Penn State players showed out in rivalry week.
The Nittany Lions are preparing to face the Ducks on short notice.