The Padres have rewarded Edinson Volquez for his hard work this spring by naming him their Opening Day starter. San Diego was expected to pick Tim Stauffer to pitch the opener, but he is bothered by a sore right triceps. Volquez was acquired along with three others in a trade Dec. 17 that sent pitcher Mat Latos to the Reds. The right-hander is 2-0 with a 3.48 ERA in 20 2/3 innings this spring.