Chargers sign four picks at once, leaving just two unsigned

The Chargers know how to take care of business. Since rookie deals are pretty boilerplate these days, they decided to do a whole bunch of them at once. According to Michael Gehlken of U-T San Diego, the Chargers signed four draft picks today — third-round guard Chris Watt, fifth-round nose tackle Ryan Carrethers, sixth-round running back…