The Raiders agreed to terms with backup quarterback Christian Ponder on a one-year deal on Friday, league sources said. He is reunited with offensive coordinator Bill Musgrave, who was with Ponder in Minnesota from 2011-13. Ponder, 27, was the Vikings’ first-round draft pick in 2011, and was 14-21-1 as a starter. He completed 59.8 percent of his passes for 6,658 yards and 38 touchdowns, but had 36 interceptions and 11 fumbles. Also, Raiders owner Mark Davis denied reports that the team was negotiating with free agent defensive end Greg Hardy. Hardy remains on the commissioner’s exempt list after he faced domestic violence charges in 2014 and ended up costing the
