MESA, Ariz. — Young prospects are lucky to get an occasional at-bat or inning to pitch at this point in the spring, but this A’s team is different. With so many touted prospects in the organization, the club has not been afraid to throw their youngsters into the fire against major league competition. Luzardo, 20, is the No. 2 prospect in the organization. The left-handed pitcher had an astonishing 48-to-5 K/BB ratio in 43 1/3 innings pitched last season.