Rubby De La Rosa to undergo Tommy John surgery

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We learned late last night that Rubby De La Rosa was diagnosed with a sprained ulnar collateral ligament in his throwing elbow. Unfortunately the injury will require the worst case scenario.

The Dodgers just announced that De La Rosa will undergo Tommy John surgery, a procedure that will likely keep him sidelined through most, if not all, of the 2012 season.

De La Rosa, 22, began this season as a starter with Double-A Chattanooga, but was promoted in late-May to pitch out of the Dodgers’ bullpen. He made just three relief appearances before joining the starting rotation in the first week of July. Who knows if moving the young right-hander from the rotation to the bullpen and back during the same season had any impact on his elbow, but it’s at least something to ponder.

Either way, this is very unfortunate news. De La Rosa has been a real treat to watch in what has been a dismal season for the Dodgers.

Cubs fire pitching coach Chris Bosio

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In something of a surprising move, the Chicago Cubs fired their pitching coach, Chris Bosio on Saturday. Bosio had held the job since the 2011-12 offseason.

The Cubs made the NLCS this year, but were nowhere as near the formidable as their 2016 World Series champion iteration. While there were several reasons for that, one was that the pitching staff, which featured multiple, better-than-expected performances in 2016, but took a step back in 2017. Some of that was personnel — Joe Maddon did not have Aroldis Chapman to call on in the postseason like he did last year — and a lot of that was mere regression from veterans like Jon Lester and John Lackey. A lot of it had to do with a much higher walk rate this year than in the past.

Still, there was no chatter during the season or at the time of the Cubs’ playoff exit the other day that Bosio might be a fall guy. The Chicago Tribune reports that it was Joe Maddon’s call and that he had grown displeased with Bosio. The Tribune report suggests that Cubs pitchers will be displeased with the move as they were devoted to Bosio. Coaches, of course, come and go, so I suspect they’ll get over it.

Whatever the case, Bosio likely won’t say unemployed for long. He is widely credited with helping Jake Arrieta transform from a project to an ace and for the considerable and the somewhat unexpectedly successful development of Kyle Hendricks. The Tribune suggests that he’d be a good fit in Minnesota, where his former teammate Paul Molitor is in search of a new pitching coach.

There are several intriguing coaches available at the moment, most notably Mike Maddux, who has been the Nationals pitching coach but whose status is now in flux given the firing of Dusty Baker. Maddux’s brother Greg, of course, is a spring training pitching instructor for the Cubs. The Tribune adds that Maddon may look to his old Tampa Bay Rays pitching coach Jim Hickey or, possibly, even recently fired Red Sox manager John Farrell, who made his bones as a pitching coach.