Puk, the 2016 sixth overall pick, impressed Friday while facing hitters for the second time, Joe Stiglich of CSN Bay Area reports.
The 21-year-old lefty has looked like he belongs in big league camp so far, and added to his solid body of work with Friday's session. He gave up minimal hard contact and was particularly effective with his changeup. Puk should make his Cactus League debut in the coming days and could start the season at the High-A level with a strong spring.