(Maybe) The Most Improved Hitter in Baseball
According to expected wOBA, which is not perfect, but which is pretty good, the most improved hitter in the major leagues is Mookie Betts. The second-most improved hitter is Leonys Martin, and the third-most improved hitter is Matt Davidson. Since xwOBA is only one measure, that means we can have a conversation. And that means there’s an argument for each of those three players, along with some others. I’ll lay out the case for Davidson here. It’s every bit as simple as it is impressive.
At this writing, Davidson is tied for the seventh-highest xwOBA overall. He’s right there with Kris Bryant. No one in baseball has a higher xwOBA on batted balls alone. If you prefer something a little more familiar, Davidson has bumped his wRC+ from 83 to 161, the second number being almost double the first. For anyone who knows anything about Davidson, the power has always been present. The improvement has taken place elsewhere. It’s maybe the most difficult improvement to make, but the easiest one to explain.