CBS announced that three longtime network veterans are being promoted to executive vice president.They are senior vice president for sales Joe Abruzzese, senior vice president for research and planning David Poltrack and senior vice president for marketing and communications George Schweitzer. While the duties of the three CBS honchos will remain the same, the promotions were a way for CBS Broadcast Group president Howard Stringer to stabilize his management team, which has been in the midst of an overhaul, and reward three key executives with a bump up. “As we continue to structure the company to provide us with the management and organization to meet the growing competitive environment, our focus on sales , research and marketing and communications will be critical,” Stringer said in a statement. “Thankfully these departments at CBS are already the best in the industry, and we have the strongest executives leading them.” The announcement of the promotions is the latest in the ongoing shake-up at the Eye web. Last week, CBS Entertainment president Jeff Sagansky announced he was leaving the network and his No. 2, Peter Tortorici, was named as his replacement. New blood Tortorici is joined by a new team of entertainment executives, including Larry Sanitsky in the No. 2 slot, expanded duties for CBS senior veep Steve Warner and the naming of David Himelfarb as veep for comedy development. In addition, former USA Network executive veep David Kenin was named CBS Sports president (Daily Variety, April 15).