Chargers sign Hadnot

The Chargers officially have announced the arrival of 21 undrafted free agents.  They’ve also signed one veteran:  offensive lineman Rex Hadnot. Hadnot, an eight-year veteran, started 16 games for the Cardinals in 2011.  He previously played for the Browns and Dolphins. In San Diego, Hadnot will join a group of guards that includes Louis Vasquez,…