The Braves have jumped out to the Majors’ best record at 12-2. After their 10-game win streak, Atlanta leads the league in home runs, staff ERA and is third in slugging percentage. Basically, whenever the offense isn’t clubbing you to death with homers, the pitching is preventing you from scoring any runs. A lethal combination so far.
But there is reason to believe that the Braves pitching is just very good rather than best-in-the-league good. Currently the Braves staff leads the majors by a wide margin with a 1.83 ERA; the second-best team, the Red Sox, has a team ERA of 2.64. As is usually the case when an entire staff pitches like vintage Pedro, there has been a bit of luck involved.
The Braves’ FIP (fielding-independent pitching) is at 3.25 – still very good, but fifth in the league. Some pitchers can consistently outpitch their FIP, but it is rare. And such a wide gap between ERA an FIP is especially due for regression. The reason the Braves’ ERA is so much lower than their FIP is due to excellent luck on balls in play.
A BABIP Story
Batting Average on Balls in Play (BABIP) typically is around .300 for the whole league. The theory is that once a batter has put the ball into play, the pitcher has no control over whether the ball will be converted into an out. This is what FIP measures. Now, this is one extreme of the spectrum. It is more likely that pitchers have a little bit of control once the ball is in play, but not total control as ERA would suggest. It is probable that some pitchers can consistently induce weaker contact, thus producing lower BABIPs from year to year, but in general, around .300 is league average.
The Braves currently lead the majors in pitching BABIP with a .235 average. They have clearly been the beneficiaries of some luck on balls put into play. Now, there are some factors that can contribute to low BABIP, namely excellent defense. detailed on Monday how Maholm’s pitch selection has changed, particularly his change-up and slider. Maybe his new approach has something to do with his ability to get balls in play to fall for outs.
In that three year span, Maholm’s strikeout rate has also risen every year, so he’s making batters miss more than ever too. This seems likely to correlate with his newfound propensity to induce weak contact. If not, and it’s all simply lucky variance; he should probably join Hudson on that Vegas trip.
Medlen is a tougher case, as he has a much smaller sample size due his age and injuries. It is worth noting that even during last season’s incredible run of starts, Medlen posted “only†a BABIP of .261, still below the league average, but nowhere near his current .219. So if last year’s performance was the absolute best-case scenario for him (and if it’s not, lock him up to a long-term contract immediately), it is simply impossible that he could maintain such a low BABIP over a whole season.
This all isn’t to say I’m down on the Braves’ pitchers at all. I think they will end the season as a top ten, likely top five staff. Mike Minor in particular has been excellent dating back to last June, and his stuff has carried over this season. And this does not even factor in Brandon Beachy, who may take over from the struggling Julio Teheran when he returns from Tommy John surgery this summer.
But it is interesting to see exactly how the Braves grabbed the majors’ best record, and realistically analyze whether they will be able to maintain this level of production. So far, at least some of their success on the pitching side is due to luck.