It’s a well-established fact that AT&T Park is one of the worst ballparks in the major leagues for offense. That’s why, despite putting up a 132 wRC+ over his last 1,500 or so plate appearances, Brandon Belt is not a very valuable fantasy first baseman. It’s also why Buster Posey, a catcher with a career 136 wRC+, has never really been worthy of a top-10 pick on fantasy draft day.
In recent years, however, a new and troubling trend has emerged for the Giants offense. While the league has been on an historic home run tear the last year and a half or so, the Giants have not kept up. In fact, they’ve done the opposite: they’re hitting more ground balls (and fewer fly balls) than just about any other team in baseball.
Ground balls are almost always worse than fly balls, even for a team that plays in a cavernous ballpark like the Giants. Since 2014, Giants hitters have a .245 AVG, .263 SLG, .223 wOBA, and 45 wRC+ on ground balls at home. On their fly balls at home, however, they have a .226 AVG, .598 SLG, .332 wOBA, and 119 wRC+ since 2014.
While the team batting average is actually higher on ground balls, the slugging percentage, wOBA, and wRC+ are so, so much worse. This is strong evidence to the effect that even a team that plays in an extreme pitcher’s park is not better off hitting ground balls — flies seem to be indisputably better no matter what. Read the rest of this entry »