The Steelers signed two more late draft picks, offensive lineman Wesley Johnson and linebacker Jordan Zumwalt, and now have four of their nine rookies under contract.
All draft picks must sign four-year contracts, although first-rounders also are subject to a fifth-year option.
Johnson, who has played all three positions in the line at Vanderbilt, was their second of two fifth-round draft picks. Zumwalt, who played both inside and outside linebacker at UCLA, was their first of two sixth-rounders.
They join Daniel McCullers and Rob Blanchflower, who signed contracts last week, to give them their final four picks under contract.