Adams, Gilbert, Pouncey, Decastro, and Beachum can run the zone. Foster, Colon, Starks, and the plodders cannot.
I forget which writer mentioned it, but said that Haley would have more input into the o-line this year and would be involved in the o-line coach hire. Tomlin liked the running game Haley had in KC. They ran a zone type scheme.
you need athletic lineman to run the ZBS successfully