We all know most of the success of this team lays on Yelich and Hiura being as productive as they have been in the past. 2020 and 2021 have not been kind to them and there have been theories on injury, sign stealing, mechanical changes, coaching, etc, but I think its pretty easy to see what is so different by taking a look at the numbers provided by Baseball Savant. Let's start with Yelich... The first thing that pops out is his walk rate: 2018 - 10.4% 2019 - 13.8% 2020 - 18.6% 2021 - 17.1% In a vacuum, this is a good thing. He is getting on base. But digging a bit deeper its because he is taking more pitches and being less aggressive and letting the pitcher dictate the at bat... Swing% 2018 - 44.3% 2019 - 45.2% 2020 - 34.6% 2021 - 40.5% First pitch swing % 2018 - 28.9% 2019 - 29.7% 2020 - 13.4% 2021 - 17.1% Important to note here is he is getting less first pitch strikes the last two years compared to his 2019 season (2019 - 54.8%, 2020 - 50.6%, 2021 - 50.0%) Meatball swing % 2018 - 81.3% 2019 - 81.3% 2020 - 66.1% 2021 - 77.8% Whiff % 2018 - 22.8% 2019 - 28.2% 2020 - 33.6% 2021 - 30.6% Zone contact % 2018 - 85.4% 2019 - 83.8% 2020 - 78.1% 2021 - 78.1% Chase % 2018 - 25.1% 2019 - 27.9% 2020 - 17.7% 2021 - 17.1% Some of these numbers are very interesting but in summary - He is swinging less in total - particularly at the first pitch - missing more, - especially in the zone - but is also chasing less. It seems to me he is letting the pitcher dictate the at bat instead of ambushing the pitcher early. These are just a few metrics that jumped out to me but there is so much more they capture. I encourage you to take a look! https://baseballsavant.mlb.com/savant-player/christian-yelich-592885?stats=statcast-r-hitting-mlb