Rethinking the rotation: Four-and-swing?

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Yahoo!’s Jeff Passan is always good for a big idea column or two each month, and his latest is one that I’ve long been arguing half-drunkenly to anyone who will listen (i.e. no one):  chucking the straight five-man rotation and going to a modified four-man thing. The idea would be to keep your four best on a firm four-days-rest schedule, skipping the fifth guy as often as possible.

As Passan shows, using the Tigers, Rangers and Angels as his examples, such a plan gives your team’s four best guys anywhere between one and three extra starts and simultaneously takes away that many starts from your worst starter.  And if you’re smart about who that worst starter is, you can give yourself something that is a vanishing breed: a bona fide long man/mopup man in the pen.

Passan notes the obstacles to this, chief among them that baseball people tend not to engage in too much original thinking unless they can help it, but he makes all kinds of sense in my view.

Problems?  Other ideas?  That is, other ideas keeping in mind that no one is going to go to a straight four-man rotation in this day and age.

Rubby De La Rosa to undergo a second Tommy John Surgery

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This is unfortunate: Diamondbacks reliever Rubby De La Rosa will undergo Tommy John surgery. This will be the second Tommy John procedure of his career, the first coming back in 2011.

De La Rosa has had elbow  issues for his entire career. Last year his UCL was barking again and he underwent stem cell therapy to try to avoid a second surgery, but it obviously hasn’t worked out. He’s pitched in only nine games this year, allowing four earned runs in seven and two-thirds innings, striking out 12.

I first saw De La Rosa in spring training in 2011. I thought his stuff was pretty phenomenal and figured he’d be a good one. Great stuff is often a function of heavy strain on an elbow, however, and pitchers breaking is, unfortunately, the rule in baseball far more than the exception.

He’ll miss a year at least. We likely won’t see him until spring of 2019, most likely on a minor league deal.

Cardinals closer Trevor Rosenthal to be examined for arm tightness

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Cardinal closer Trevor Rosenthal was taken out of last night’s game against the Red Sox after he gave up a big homer and a walk. He velocity was down as well, and Mike Mathney said after the game that he didn’t look right. Now the Cardinals are going to take a closer look at him, and he’ll be examined today for what is being described as “tightness” in his right arm.

Rosenthal is 3-4 with a 3.40 ERA and a K/BB ratio of 76/20 in 47.2 innings. He has 11 saves after regaining the closer’s job from Seung Hwan Oh. Now some combination of Oh, Tyler Lyons, and John Brebbia will fill in for Rosenthal to the extent he needs to miss time.