NFL, referees closing in on new deal? (CBS/AP) Two days after a controversial call cost the Green Bay Packers a win, a deal to get the regular referees back is on the horizon, as CBSSports.com's Mike Freeman confirms a tentative deal between the NFL and locked-out officials. There's no signed agreement but a variety of sources tell Freeman a deal is so close that locked out officials and the NFL could have something permanent in place by the end of the week. Significant progress was made during the past 24 hours. NFL Referees Association negotiator Scott Green has told officials a deal likely won't happen today, a source tells Freeman, but Freeman was also told Green said a deal is extremely close, possibly being consummating by the end of the week. ESPN reported Wednesday that "an agreement in principle is at hand," and The New York Times reported that the sides "were closing in" on a way to end the impasse. ESPN cited unidentified sources from both sides; the Times cited a person briefed on the negotiations. The NFL declined to confirm that a deal was imminent. Vegas bookmakers say at least $300 million changed hands with controversial NFL call NFL upholds Seahawks' disputed win over Packers, resumes talks with locked-out referees Controversial Monday Night Football ending puts replacement officials back in spotlight CBSSports.com: Top 10 mistakes made by replacement officials "Until somebody tells me differently, it's not really changed," Arizona coach Ken Whisenhunt said. Still, even the suggestion that regular refs could be back as early as Sunday was greeted with welcoming words. "If it's final and they are, I'm sure a lot of people will be happy - and I'll be one of those guys, too," running back Adrian Peterson said on a conference call from Detroit in advance of the upcoming Vikings-Lions game. NFL agent David Canter tweeted: "Welcome back real refs. Just remember when you blow a call you'll get no sympathy. A person briefed on the negotiations told The Associated Press that the talks between the league and its officials resumed Wednesday after a short break after going a 14-hour meeting that started Tuesday. The person spoke to AP on condition of anonymity because the discussions were not made public and would not characterize the talks. The debate over the use of replacement officials has raged since the start of the season, and boiled over after the final play of the Packers-Seahawks game. A last-second scrum in the end zone was ruled a game-winning touchdown by Seahawks receiver Golden Tate. But Packers players, their fans and much of the football-watching public saw an interception by Green Bay's M.D. Jennings. Aaron Rodgers, Green Bay's quarterback and the reigning league MVP, used his weekly radio show Tuesday as a platform to lash out at the NFL and question its priorities. Even President Barack Obama has weighed in on the dispute, tweeting Tuesday that "NFL fans on both sides of the aisle hope the refs' lockout is settled soon." Even a deal was reached it was still uncertain how it would affect the weekend's games. "Your loud voices r heard about getting Refs back," Indianapolis Colts owner Jim Irsay wrote on Twitter. We're desperately trying 2 get it done! We want a deal that improves officiating overall.