All right, before we start, this is great:
Yonder Alonso's son Troy reacting to his dad’s grand slam is so pure pic.twitter.com/upyuvAvCHN
— Kent (@RealKentMurphy) June 24, 2018
Before 2017, Yonder Alonso only played a full season twice in his MLB career. He never had double-digit home runs — with a career high of nine. His highest fWAR season was 1.2, and from 2012 (his first real time in the majors) to 2016, he was the 30th-best first baseman in baseball.
Thanks to some critical swing and swing path changes in 2017, which greatly increased led his launch angle and good contact, Alonso blossomed into an All-Star.