Rockies go radical: Four-man rotation, 75-pitch limit

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If there was ever a team that should be trying something different, it’s the 2012 Rockies with their 25-40 record and their 6.28 starter’s ERA. Still, this doesn’t seem like a great idea.

Manager Jim Tracy revealed this afternoon that he plans to go with a four-man rotation and limit all of his starters to 75 pitches per outing.

“We had to do something that was unconventional,” Tracy said.

Jeremy Guthrie, who is expected to be traded in the near future, was moved to the pen to set up the new arrangement. The Rockies will go with a rotation of Christian Friedrich, Jeff Francis,  Alex White and Josh Outman for now.

Rockies starters have been the worst in the NL this year, and it hasn’t helped matters that Coors Field is back playing like it did in the early part of the last decade. Of the 10 pitches to start games for the Rockies this season, only one has managed a sub-5.00 ERA. That’s Drew Pomeranz, who was sent back to the minors after going 0-2 with a 4.70 ERA in his five starts. The best ERA of the pitchers currently in the rotation belongs to White, who is at 5.56 after eight starts.

It will be interesting to see just how this affects a bullpen that has already been overworked this season. Tracy will often be getting just four innings from his starters, so he’s going to have to treat relievers Guillermo Moscoso, Matt Belisle, Adam Ottavino and Guthrie like long guys. If he starts yanking those guys out after an inning of work, he’s going to have big problems within a week or two. However, if he’s willing to let some of them throw three innings, take two days off and then come back out and throw two or three innings again, maybe the experiment will survive until the All-Star break anyway.

Dodgers designate Sergio Romo for assignment

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The Dodgers announced on Thursday that the club activated pitcher Grant Dayton from the 10-day disabled list and designated pitcher Sergio Romo for assignment.

Dayton, 29, went on the disabled list earlier this month with neck stiffness. He’ll resume with a 3.63 ERA and a 20/12 K/BB ratio in 22 1/3 innings.

Romo, 34, signed a one-year, $3 million deal with the Dodgers in February. It didn’t really work out, as the right-hander posted a 6.12 ERA with a 31/12 K/BB ratio in 25 innings. His peripherals are still decent, so it wouldn’t be surprising if a team in need of a bullpen arm makes a deal with the Dodgers within the week.

Nate Karns underwent season-ending surgery for thoracic outlet syndrome

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MLB.com’s Jeffrey Flanagan reports that Royals pitcher Nate Karns underwent surgery for thoracic outlet syndrome on Wednesday. He’s expected to be ready for spring training next year. Karns went on the disabled list in May with an elbow injury and didn’t make much progress.

The Royals acquired Karns from the Mariners in January in exchange for outfielder Jarrod Dyson. Over eight starts and one relief appearance, the 29-year-old right-hander compiled a 4.17 ERA and a 51/13 K/BB ratio in 45 1/3 innings.

Karns will enter his first of three years of arbitration eligibility after the season, so he’ll be under the Royals’ control through 2020.