Dodgers acquire Carlos Marmol from Cubs for Matt Guerrier

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In a swap of relievers who were designated for assignment, Bruce Levine of ESPN Chicago reports that the Cubs have traded Carlos Marmol and about $200,000 in international signing bonus money to the Dodgers for Matt Guerrier.

Marmol certainly has a lot more upside than Guerrier, who’s been little more than middle relief-caliber since signing a three-year, $12 million deal with the Dodgers two-and-a-half seasons ago. This year Guerrier had a 4.80 ERA and 21/12 K/BB ratio in 30 innings. Of course, Guerrier is also much less likely to completely implode on the mound, which Marmol has done far too often this season.

On the other hand, even while struggling overall this season Marmol racked up 32 strikeouts in 28 innings, posting a double-digit strikeout rate for the eighth consecutive season, and from 2007-2012 he posted a 2.90 ERA with the majors’ highest strikeout rate and lowest opponents’ batting average. If the Dodgers can get him to go from “worst control of all time” to merely “really, really bad control” he’s still capable of overpowering hitters.

Chicago’s move to unload Marmol comes just minutes after the Cubs traded Scott Feldman to the Orioles for Jake Arrieta, Pedro Strop, and about $400,000 in international bonus money.

Shelby Miller likely to make season debut on Monday

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The Diamondbacks announced that the club optioned starter Matt Koch to Triple-A Reno after Tuesday night’s game. According to Nick Piecoro of Azcentral Sports, Shelby Miller will likely be activated from the 60-day disabled list to start against the Marlins on Monday.

Miller, 27, has been out since late April of 2017 after undergoing and rehabilitating from Tommy John surgery. The right-hander has had a rough time since coming to the Diamondbacks in a trade with the Braves, starting 24 games since the beginning of the 2016 season with a 5.78 ERA and a 90/54 K/BB ratio in 123 innings.

That trade, consummated on December 9, 2015, is certainly one the D-Backs would like to take back. They received Miller and Gabe Speier from the Braves and gave up Ender Inciarte, Dansby Swanson, and Aaron Blair.

Koch, 27, made 12 starts and one relief appearance this season, compiling a 4.40 ERA with a 38/17 K/BB ratio in 71 2/3 innings.