Park factors
The Brewers currently lead Major League Baseball in home runs, which is nothing too out of the ordinary for the team that calls Miller Park home.
Since 2013, Miller Park has ranked in the top three in terms of Fangraphs’ home run park factors. In 2015, its home run factor for right-handed hitters ranked 3rd at 110 (league-average is 100) while its home run factor for left-handed hitters ranked 4th in the league at 114.
Fenway Park, on the other hand, ranked 11th for right-handed hitters at 104, and 28th for left-handed hitters at 89. Despite what the legendary David Ortiz would lead you to believe, Fenway is where lefty power hitters go to die unless they can make the opposite-field adjustment.
Shaw is reaping the benefits of one of the most drastic stadium changes possible for a lefty slugger. He hit 16 homers in 145 games as a member of the Red Sox in 2016, and currently sits at seven through 30 games. That’s on pace for almost 34 home runs in 145 games. Think he would do that at Fenway?