How will the Twins replace Joe Nathan at closer?

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Joe Nathan is likely headed for season-ending Tommy John surgery and suddenly the Twins are faced with replacing a closer who’s converted 91 percent of his save chances with a 1.87 ERA during six seasons in Minnesota.

Truly replacing Nathan will be impossible, because few closers in baseball history have had a six-year stretch that dominant, but bullpen depth was a strength for the Twins before he went down and they now have a handful of capable in-house options to choose from in the ninth inning …

  • Jose Mijares was often billed as a “future closer” in the minors and had a 2.34 ERA in 62 innings as a rookie, but Ron Gardenhire may be hesitant to trust a second-year southpaw who allowed right-handers to bat .283 with a .791 OPS against him.
  • Matt Guerrier has been one of the league’s best setup man in six years with the Twins, posting a 3.41 ERA in 401 innings, but his raw stuff isn’t overpowering and Gardenhire may not like the idea of yanking him from primary (and often multi-inning) setup duties for a role he’s never filled before.
  • Jon Rauch looks like a closer at 6-foot-11 with neck tattoos and has the most closing experience in the group, but even that basically amounts to 17 saves with the Nationals in 2008 and his raw stuff is much closer to Guerrier than Nathan.
  • Jesse Crain was once thought of as a future closer and has the mid-90s fastball for the job, but struggled his way to a mid-season demotion to Triple-A last year and has never been particularly consistent or reliable even in a setup role.
  • Pat Neshek was dominant as a setup man with a 2.91 ERA and 142 strikeouts in 121 innings, but is coming back from Tommy John surgery of his own and just saw his first post-surgery game action last week. As a side-armer his relative susceptibility versus lefties is also a potential issue.
  • Francisco Liriano was moved to the bullpen last year after struggling as a starter, but if he looks good enough to be a closer option the Twins will want him back in the rotation and if he doesn’t impress enough to win a rotation spot they won’t trust him in the ninth inning.

Handicapping the situation is tough, because Gardenhire hasn’t given any hints and the most experienced, trustworthy options also have the least impressive raw stuff. I’d likely go with a closer-by-committee approach that used Mijares whenever lefties are due up, but Gardenhire seems likely to prefer one man for the job and it wouldn’t be surprising if Rauch’s previous closing experience, however brief, gives him the edge initially.

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.