Starbucks says its chief operating officer, Troy Alstead, is taking an "extended unpaid leave" after 23 years with the company. Alstead's last day will be March 1, the company said. Starbucks spokesman Jim Olson did not say whether Alstead would be returning. He said it was a "very personal decision." Alstead's upcoming departure comes as Starbucks seeks to expand beyond its popular lattes and Frappuccinos. To continue driving sales growth, the company has introduced new and revamped food offerings such as warmed up sandwiches and salad boxes intended to attract customers in the slower afternoon hours.