Matthew Boyd’s Home Run Problem
In April, Matthew Boyd gave up two homers. In May, five balls left the yard against the Tigers lefty. Last month, Boyd’s breakout season slowed as he gave up 10 homers. As we enter July, Boyd has a solid 3.57 FIP and a 3.72 ERA, and has been worth 2.6 WAR, which ranks 17th among pitchers this season. Those are good numbers to be sure, but as June began, Boyd’s ERA and FIP were both 2.85 and his 2.5 WAR ranked third for pitchers behind only Max Scherzer and Stephen Strasburg. Boyd’s strikeouts and walks have been slightly better than they were earlier in the season; his BABIP is slightly higher and his LOB% is a little bit lower. But that doesn’t explain his 5.90 ERA and 5.37 FIP. It’s the home runs that are hurting Boyd, and with the trade deadline a month away, trying to determine whether they are randomly bunching across a few starts or the beginning of a trend is an important exercise for teams looking to reinforce their rotations.
As for how Boyd broke out in the first place, the answer is a bit easier to find — the work has already been done for us. Sung-Min Kim detailed Boyd’s transformation earlier this season, showing how Boyd lowered his arm slot to gain spin on his fastball, and raised the location of the pitch. He also buried his slider more often, gained a consistency in his delivery, and basically eliminated the two-seamer. David Laurila also wrote on Boyd earlier this season, discussing his work with Driveline to create a better slider.
Boyd’s season can be carved up any number of ways depending on how you might want to use (and abuse) arbitrary endpoints. If we took away the first three spectacular Boyd starts of the season, where he struck out 29 and walked six, his FIP is 4.09, his ERA is 3.95, and he’s averaging nearly two homers every nine innings. If we look at just his first 10 starts, he’s one of the best pitchers in baseball. He has five starts with 0 or 1 runs. He’s only got two starts where his strikeouts don’t at least equal his innings pitched. The only time he walked as many as three batters, he struck out 13 Yankees. If Boyd had evenly spaced out his 17 homers across his starts, we’d be discussing a moderate breakout. Instead, we have a massive breakout followed by concern. Read the rest of this entry »