One back who might have been highly sought after on the free agent market this year was San Diego 's Darren Sproles .
The San Diego reversed course before the market opened and chose to extend a tender offer to the speedy scatback .
One back who might have been highly sought after on the free agent market this year was San Diego 's Darren Sproles , but the Chargers reversed course before the market opened and chose to extend a tender offer to the speedy scatback .