The blood is flowing like water at the RenCen, as brand-new Buick-GMC manager Michael Richards has left General Motors after nine days on the job. The Detroit News reports that Susan Docherty’s replacement left to “pursue other career opportunities.” Richards had been VP Sales and Marketing at Austin, Texas automotive firm Trilogy, and according to the DetN’s sources:

Trilogy made a strong counteroffer to keep Richards, and he was said to be considering that offer in light of Friday’s management shakeup engineered by Chairman and CEO Ed Whitacre

So much for hiring outsiders.