The day after the 34-minute blackout at the Super Bowl, the exact cause -- and who's to blame -- were unclear, though a couple of potential culprits had been ruled out.It wasn't Beyonce's electrifying halftime performance, according to Doug Thornton, manager of the state-owned Superdome, since the singer had her own generator. And it apparently wasn't a case of too much demand for power. Meters showed the 76,000-seat stadium was drawing no more electricity than it does during a typical New Orleans Saints game, Thornton said.To New Orleans' great relief, NFL Commissioner Roger Goodell said the city did a "terrific" job hosting its first pro football championship in the post-Katrina era, and added: "I fully expect that we will be back here for Super Bowls."The problem that caused the outage was believed to have happened around the spot where a line that feeds current from the local power company, Entergy New Orleans, connects with the Superdome's electrical system, officials said. But whether the fault lay with the utility or with the Superdome was not clear.Sunday's Super Bowl was New Orleans' 10th as host, and officials plan to make a bid for an 11th in 2018.Ratings reportBetween a partial power outage, overly excited quarterback and a game that suddenly turned from snoozer to sizzler, CBS had its hands full with the Super Bowl. The game fell short of setting a viewership record, but it stands as the third most-watched program in U.S. television history.The Nielsen Co. said an estimated 108.4 million people watched the Baltimore Ravens' 34-31 victory over the San Francisco 49ers. The most-watched events in U.S. TV history were last year's game, seen by 111.3 million, and the 2010 game, with 111 million viewers.Dooley move officialThe Dallas Cowboys on Monday announced the hiring of former University of Tennessee head coach Derek Dooley as receivers coach, making official a move reported two weeks ago.Dooley, 44, replaces Jimmy Robinson, who spent the last two years as receivers coach for the Cowboys and will remain in the organization as a "senior coaching consultant." Robinson got credit last year for the development of third-year receiver Dez Bryant.The move leaves the Cowboys with openings at running backs coach and tight ends coach.-- Carlos MendezBriefly Ravens: Baltimore Mayor Stephanie Rawlings Blake said the city's parade for the team will begin at City Hall today and end with a free celebration at M&T Bank Stadium. The Ravens arrived back home Monday afternoon, and about 150 fans greeted them upon their arrival at the team's facility.Lions: WR Titus Young was released in an unsurprising move. Young was banished from the team in November for what coach Jim Schwartz called unacceptable behavior and was later placed on injured reserve. Young criticized the team several times via Twitter.Bengals: Rookie LB Brandon Joiner was activated after completing a prison term. Joiner, signed as a free agent out of Arkansas State, served roughly nine months of a three-year sentence for his involvement in a robbery in 2007 while he was enrolled at Texas A&M.