The big difference for Kepler in 2019 was he pulled the ball 53.4% of the time (no other season comes in higher than 44.3%). He also made a career high amount of hard contact (42.4%, not other season higher than 37.1%). As a result, his HR/FB rate was also a career high at 18% (no other season higher than 15.2%. I'm not super sure 2021 Kepler is 2017/2018/2020 Kepler though; yes, it's early, but he is walking less, striking out more, and hitting more ground balls. If that continues, Kepler will have very little value, and 2023 will undoubtedly be his last season in MN (if he makes it that far).