Check out this line from Madison Bumgarner’s start last night: 0.1 IP, 9 hits, 8 earned runs, 1 strikeout.
Holy implosions, Batman! Not only did this start cause countless fantasy owners to collapse in grief, it also solidified Bumgarner a spot in the record book; as multiple people have pointed out, Bumgarner became the first starter in the live-ball era to allow nine hits while only recording one out. And here I was, thinking that Vin Mazzaro had already used up this year’s allotment of “historically bad ineffectiveness.”
So in light of this performance, here’s the question I want to tackle: why was Bumgarner so bad last night? Overall, he’s been a great pitcher so far this year — while his ERA is a tad high now (4.00), his 2.90 FIP and 3.47 xFIP both speak to his excellent peripherals. His strikeout rate is slightly up this season and his K/BB ratio is only slightly lower, and he’s managed to generate more swinging strikes while limiting his homeruns allowed. The biggest reason that his ERA is so inflated this season appears to be his .333 BABIP — hitters are simply getting more hits off him, as we saw in dramatic fashion last night.
As Dave Cameron pointed out in a very timely post on BABIP yesterday, there are three main variables that go into influencing a pitcher’s BABIP: good or bad defense, luck, and pitching. While saberists have historically focused on “luck” as the main reason for variations in BABIP, the truth is that all three of these variables are constantly interacting with one another — and not only that, but bad pitching is to blame more than many of us normally admit.
Want a prime example of these interacting factors? Let’s take a play-by-play look at Bumgarner’s start yesterday.
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