Hard-throwing Lucas Giolito

Scouts watch as Lucas Giolito goes through his first public workout since injuring his elbow during an early season game for Harvard-Westlake High.  (Anne Cusack / Los Angeles Times)

Lucas Giolito unleashes a throw during a workout at O’Malley Family Field in Encino. The potential first-round draft pick missed nearly all the high school season with an eblow injury.  (Anne Cusack / Los Angeles Times)

Harvard-Westlake High pitching coach Ethan Katz talks with Lucas Giolito during his public workout at O’Malley Family Field in Encino.  (Anne Cusack / Los Angeles Times)

Lucas Giolito shares a laugh with Harvard-Westlake High teammates during their Southern Section Division 2 playoff opener against Ventura at O’Malley Family Field.  (Anne Cusack / Los Angeles Times)

Harvard-Westlake High pitcher Lucas Giolito, whose fastball was clocked at 100 mph this spring, has his arm wrapped with ice toward the end of a game against Alemany High earlier this spring at O’Malley Family Field in Encino.  (Christina House / For The Times)

Harvard-Westlake High pitcher Lucas Giolito works against Alemany High during a game earlier this spring at O’Malley Family Field in Encino. He gave up five hits and two runs while striking out four, walking three and hitting three batters in 6 1/3 innings.  (Christina House / For The Times)