"After the '16 season, LG Josh Sitton, LT David Bakhtiari, RG T.J. Lang and C/T JC Tretter are scheduled to become unrestricted free agents."

plus

"In addition to those four linemen, players scheduled to become free agents after this season are: RB Eddie Lacy, S/CB Micah Hyde, DE Datone Jones, OLB Julius Peppers, ILB Sam Barrington, OLB Jayrone Elliott (restricted) and DL Mike Pennel (restricted)."

equals

TT unlikely to be very active in free agency.