Tony Romo spoke about his back surgery for the first time Saturday night and said his rehabilitation is going well and that there were “no setbacks of any kind.”Romo, speaking to ESPN’s Rece Davis, said that he is on target to participate in organized team activities in May.“We’re getting close now to [returning],” Romo said. “Usually takes three months, it’s just [a] normal, kind of roundabout date that they give you and we’re right on schedule. Really ahead in a lot of ways. Just going to be ready to go here in about a month, and rehab is going good, no setbacks of any kind.”Romo dealt with back issues in 2013 but late in the Week 16 game against the Washington Redskins he came up limping after spinning away from a potential sack. He suffered a herniated disk and had surgery two days before the season finale against Philadelphia.He is expected to be ready to start the off-season program on time.“Everything just starts small and you progress up,” Romo said of his rehabilitation. “Now it’s just going to the next step every week or two and just attacking. For me, it’s like anything else, just another thing to attack and improve, and I’m always up for that.”Briefly • Lions: William Clay Ford Sr., who bought the team in 1963, has died at the age of 88. Ford was the last surviving grandchild of Henry Ford, and the largest individual shareholder in Ford Motor Company. • Vikings: Defensive end Everson Griffen has agreed to terms on a five-year, $42.5 million contract with $20 million guaranteed. Minnesota also agreed on a one-year deal with middle linebacker Jasper Brinkley. • Jets: Cornerback Antonio Cromartie was released, saving $9.5 million in cap space. The eight-year veteran was bothered by a hip injury in 2013.• Cardinals: Running back Rashard Mendenhall is retiring after six seasons, the first five with the Steelers, his agent confirmed. He was the No. 23 overall pick in 2008.