If you're worried about Hamels, look past his ERA

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Even with eight shutout innings last night Cole Hamels merely lowered his ERA to a still-mediocre 4.52 to go along with a 7-8 record. That represents quite a decline from last season, when he won 14 games with a 3.09 ERA before taking home the MVP awards for both the NLCS and World Series.
However, a closer look at Hamels’ performance tells a much different story than his win-loss record or ERA:

YEAR     SO%    BB%    HR%     GB%     FB%     LD%    LOB%     MPH
2008    21.4    5.0    3.1    39.5    38.7    21.8    76.0    90.4
2009    20.2    4.8    3.5    42.1    37.4    20.5    73.4    90.2

From left to right, the numbers shown above are strikeout percentage, walk percentage, home run percentage, ground-ball percentage, fly-ball percentage, line-drive percentage, left-on-base percentage, and average fastball velocity. And as you see, every single one of those numbers is essentially the same as last season. There isn’t a meaningful change in the bunch, so how has his ERA ballooned from 3.09 to 4.52? There are a few possible explanations, but the easiest one is batting average on balls in play.
Last season just 27.0 percent of the balls put in play against Hamels went for hits. This season, despite a very similar breakdown of ground balls, fly balls, and line drives, 32.9 percent of the balls put in play against Hamels have gone for hits. Over the course of 25 starts that equals about 30 extra hits falling in, which is worth somewhere around 12-18 runs. And if you remove, say, 15 runs from Hamels’ total this season his ERA drops from 4.52 to 3.59. His career ERA coming into the season? 3.43. Funny how that works.

Bronson Arroyo is throwing side-arm now

Washington Nationals pitcher Bronson Arroyo catches a pop fly during a drill at a spring training baseball workout, Saturday, Feb. 20, 2016, in Viera, Fla. (AP Photo/John Raoux)
AP Photo/John Raoux
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Nationals pitcher Bronson Arroyo has partial tears of tendons in his rotator cuff in his right shoulder. Considering he’s 39 years old, no one would fault him if he decided to call it quits. But he has one more idea, MASN’s Mark Zuckerman reports: Arroyo is going to throw side-arm, or at least three-quarters.

“It hurts when he gets on top [of the baseball],” manager Dusty Baker said. He continued, “So we’re taking our time. And if not, if nothing else, he’s a good guy to have in your organization.”

Arroyo missed the latter half of the 2014 season and the entire 2015 season after undergoing Tommy John surgery. Prior to that, he was known as a workhorse, racking up at least 199 innings in each of nine seasons between 2005-13.

Robbie Erlin needs Tommy John surgery

San Diego Padres' Robbie Erlin pitches during the first inning of a baseball game against the Philadelphia Phillies, Tuesday, April 12, 2016, in Philadelphia. (AP Photo/Matt Slocum)
AP Photo/Matt Slocum
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Padres pitcher Robbie Erlin has a partial tear of his ulnar collateral ligament and he’ll need Tommy John surgery as a result, Dennis Lin of the San Diego Union-Times reports. Erlin landed on the disabled list on April 21. Now he’ll miss the rest of the season and likely the beginning of the 2017 season as well.

Erlin, 25, posted a 4.02 ERA with a 13/3 K/BB ratio in 15 2/3 innings spanning two starts and one relief appearance to begin the 2016 season.

Cesar Vargas moved into the rotation in Erlin’s absence and has pitched well thus far in two starts, yielding only one earned run with a 9/6 K/BB ratio over 10 1/3 innings.

The Reds’ bullpen set an ignominious record

CINCINNATI, OHIO - APRIL 08: Caleb Cotham #54 of the Cincinnati Reds pitches in the sixth inning of the game against the Pittsburgh Pirates at Great American Ball Park on April 8, 2016 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)
Joe Robbins/Getty Images
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Reds reliever Caleb Cotham allowed a pair of runs in the top of the eighth inning of Tuesday’s game against the Giants, setting a rather ignominious club record. It marks the 21st consecutive game in which the Reds’ bullpen has allowed a run, setting a new major league record, as C. Trent Rosecrans of the Cincinnati Enquirer points out.

Entering Tuesday’s action, the Reds’ bullpen had been by far the worst in the majors with a 6.54 ERA. The Padres’ bullpen, second-worst, is comparatively much better at 5.27.

The last time the Reds’ bullpen had a clean night was April 10 against the Pirates. That afternoon, Dan Straily, Jumbo Diaz, and Ross Ohlendorf combined for five scoreless innings in a 2-1 victory.

Aroldis Chapman will rejoin the Yankees on Monday

New York Yankees relief pitcher Aroldis Chapman goes into his windup against the Toronto Blue Jays during the fifth inning of a spring training baseball game Thursday, March 10, 2016, in Tampa, Fla. (AP Photo/Chris O'Meara)
AP Photo/Chris O'Meara
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Yankees reliever Aroldis Chapman was suspended 30 games by Major League Baseball under its domestic violence policy for an offseason incident in which he allegedly pushed and choked his girlfriend, then discharged a firearm at least eight times in his garage. Monday marks game number 30, and Chapman is set to rejoin the club then, MLB.com’s Bryan Hoch reports. Manager Joe Girardi plans to insert Chapman directly into the closer’s role if a save situation arises against the Royals on Monday.

Chapman will make two appearances in the Gulf Coast League this week to continue warming up. He had been throwing in extended spring training games at the Yankees’ complex in Tampa.

The Yankees acquired Chapman from the Reds at the end of December, sending Caleb Cotham, Rookie Davis, Eric Jagielo, and Tony Renda to Cincinnati in return. While the back end of the bullpen hasn’t been an issue for the Yankees, seemingly everything else has for the 8-15, last place club.