Kevin Boss and the Raiders got along so well during his workout that the negotiations apparently went into high-gear after that. This comes from the New York Daily News:
"According to reports, the 27-year-old Boss was impressive in his workout for Raiders coach Hue Jackson and he was still at their camp in Napa, Calif., late Wednesday night. Boss was expected to take a physical, too. It was not immediately known if he was ready to sign a deal."