Davis did not utilize his curveball this year, which may not be surprising after looking at the movement he gets from it: Both the vertical and horizontal breaks were below league average (8 and 2 inches, respectively).
In his two seasons in the league, Davis has struggled with his fastball, as batters are hitting .381 against it with eight home runs in 97 plate appearances. He’s seen its velocity drop a full point this year, which is not a trend you want to see in a pitcher who is prone to the long ball.
Davis threw his splitter more often this year (16%) than in his previous season in the league (1%), and was able to hold batters to a single hit in six at-bats. However, he did have problem with control, as the pitch ended the season with a strike rate of 39%.
Davis cut his slider usage in half from where it was in 2017 (20%), which is surprising since he had some success with it that year, allowing a batting average of only .227 in 26 plate appearances, along with a respectable wOBA of .345. However, that is not to say he performed badly this year, as he gave up only one hit in six at-bats while also striking out two.