Per Jon Heyman

Sources: #SFGiants are calling up Mike Yastrzemski, grandson of Hall of Famer Carl Yastrzemski.

https://www.mlb.com/news/mike-yastrz...llup-by-giants

The kid has been tearing up the Pacific Coast League, showing consistent power for the first time in his career. Congratulations, to the kid. He has had a long road to the majors. Grandpa must be thrilled.