In the celebratory mood that pervades Raider Nation, there was a disquieting development Monday with the news that starting tight end Lee Smith will undergo surgery for a reported broken leg and probably will miss the rest of the season. Smith was injured after catching a short pass in the second quarter of the Raiders’ 28-27 win over the Ravens on Sunday in Baltimore. Signed by the Raiders as a free agent before last season, Smith has been a vital part of their running game. “It’ll take several people in all likelihood to fill his shoes because of all that he did — mainly the dirty work, the blocking,” head coach Jack Del Rio said. Oakland’s third road win of the season gives the Raiders a huge boost going into Sunday’s home game against the Chargers. The Raiders are almost perfect in the red zone with 10 touchdowns and a field goals in 11 trips. Del Rio said offensive coordinator Bill Musgrave should join quarterback Derek Carr in getting the lion’s share of the credit. Musgrave’s offense ran a no-huddle effectively on the Raiders’ second touchdown drive. King showed an extensive repertoire of dance moves to celebrate his best punts, emulating, among others, Baltimore’s iconic linebacker Ray Lewis and Cam Newton. Rookie offensive tackle Vadal Alexander, in his first start, had three holding calls and a false start.