The reason "Vlad" (Vladimir Guerrero Jr.) hates the Yankees traces back to a personal and family grudge. When he was a kid, there was an incident where the Yankees did not allow him on the field during batting practice, while the children of other Yankees players were allowed. This exclusion apparently stuck with him and contributes to his strong dislike for the team. Guerrero Jr. has stated publicly that he will never play for the Yankees and takes pride in "owning" them on the field as a form of revenge for that perceived snub. The sentiment seems personal and deep-rooted, extending to a family dimension related to how the Yankees treated his father during free agency years ago, which also left lasting resentment. In summary, Vladimir Guerrero Jr.'s hate for the Yankees is fueled by childhood exclusion at the Yankees' stadium and lingering family grievances over the Yankees' dealings with his father, Vladimir Guerrero Sr. This has made his rivalry with the Yankees more than just sports-related; it is personal and longstanding.
