How would a 4-3 alignment look in 2013 if, say, Harrison, Hampton and Brett Keisel, who will be 34 next year, were no longer here?
"We can do it," said Foote, who noted they have practiced the 4-3, especially last season when Harrison and Woodley were hurt. Just in case.
He also noted that coordinator Dick LeBeau, linebackers coach Keith Butler (coordinator in waiting) and coach Mike Tomlin all have worked with 4-3 defenses.
"We threw it in when our linebackers got hurt and we were down in numbers," Foote said. "... We had it to a point, we repped it and they were comfortable running it."
Woodley said he prefers to play linebacker in the 3-4 because his duties are more varied than when he played end at Michigan and mostly rushed the quarterback.
"Could we transition to it? Yeah, we can transition to it," Woodley said. "We have enough of everything to transition to it."