Bill James thinks Sabermetrics has overrated ground ball pitchers

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Rob Neyer expounded on a Bill James piece (here, behind a paywall) at SB Nation in which James says that proponents of Sabermetrics have “horribly overstated” the case for ground ball pitchers. He cites a handful of elite pitchers — Tom Seaver, Bob Gibson, Randy Johnson, Justin Verlander, among others — and points out that they weren’t very good in the ground ball department. He also cites a handful of ground ball pitchers — namely Chien-Ming Wang and Brandon Webb — who have had serious issues with injuries.

What I have never understood about ground ball pitchers, and do not understand now, is why they always get hurt. Show me an extreme ground ball pitcher, a guy with a terrific ground ball rate, and I’ll show you a guy who is going to be good for two years and then get hurt.

[snip]

They’re great for two years, and then they blow up. Always.

The one exception to James’ analysis is, of course, Derek Lowe, who made at least 32 starts in each season from 2002-11.

I don’t think we have the capability to make a strong conclusion one way or another based on the quality of data we have right now. Presently, there is no differentiation between types of batted balls. There is a vast difference between a dribbler down the third base line and a screamer up the middle. FanGraphs differentiates between infield and outfield flies, which has helped us to better appreciate pitchers like Matt Cain and Jonathan Papelbon. No such distinction is made for ground balls.

There is no way of knowing now, of course, but there may be a link between injury risk and the types of ground balls a pitcher induces. Basing analysis on data that utilizes binary qualitative groups — “on the ground” and “not on the ground” — is far too broad.

(Tip of the cap to David Schoenfield at ESPN Sweet Spot for directing me to Neyer and James.)

Felix Hernandez will miss 3-4 weeks with shoulder bursitis

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Mariners’ right-hander Felix Hernandez is looking at a 3-4 week recovery period, the team announced on Friday. Hernandez has been officially diagnosed with bursitis in his right shoulder after getting pulled from his last start against the Tigers on Tuesday.

It’s not the first shoulder issue the 31-year-old righty has dealt with during his career. Ryan Divish of the Seattle Times notes that Hernandez was previously diagnosed with bursitis during a minor league stint in 2005, several weeks prior to making his major league start for Seattle. This time around, however, the injury is coupled with a few years of not-so-sharp stuff, waning velocity and career-low numbers, and while it’s certainly not a worst-case diagnosis, it seems like greater cause for concern.

Without Felix, the Mariners will keep rolling with James Paxton, Hisashi Iwakuma, Ariel Miranda, Yovani Gallardo and Chase De Jong in their rotation. They’ll also keep Ben Gamel in right field, with starting right fielder Mitch Haniger expected to miss 3-4 weeks after sustaining a Grade 2 strain in his right oblique on Tuesday.

Rays acquire RHP Drew Smith from Tigers

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The Rays acquired minor league reliever Drew Smith from the Tigers on Friday, per a team announcement. The move will close the loop on the trade the two teams began in January for backup outfielder Mikie Mahtook.

Smith, 23, pitched his first full season in Single-A West Michigan in 2016, turning in a 2.96 ERA, 4.3 BB/9 and 11.5 SO/9 in 48 2/3 innings. The right-hander is still several levels away from making any impact on the Rays’ major league roster, but appears to be progressing steadily in two seasons of pro ball and has delivered two runs, four walks and 12 strikeouts in his first 11 2/3 innings at High-A Lakeland this season. Marc Topkin of the Tampa Bay Times reports that he’ll be reassigned to the Rays’ High-A Charlotte this week.