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Eddie Butler returns to the Rockies rotation today

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The Rockies face the Padres at 2:10 MT and will try to avoid a sweep.

Benny Sieu-USA TODAY Sports

After a stint in Triple-A, Eddie Butler returns to the big leagues to face Andrew Cashner and the Padres.

Post-prospect Eddie Butler makes his return to the big leagues today. Butler started the year with the Rockies and had a rough time of it. In 11 starts he put up a 4.80 ERA. Measured by Deserved Run Average (DRA), Baseball Prospectus's new pitching metric, Butler's 6.58 mark indicates that he was the second worst pitcher in all of baseball among those with at least 50 innings pitched, besting only Bud Norris.

Most worryingly, I previously noted, was that Butler was walking a bunch of batter without striking out many. His big league BB/9 above four and K/9 below five will simply not sustain a successful career. However, there have been examples of pitchers who began their careers with such numbers and turned it around. But he still has to turn it around. In six starts for the Albuquerque Isotopes, Butler posted a 6.27 ERA with a BB/9 of 4.4 and a K/9 of six. The uptick of strikeouts in a small sample is nice to see, although the walks are still there. Aside from the obvious (run prevention), keep note of walks and strikeouts during Butler's start today.

The Padres send a pitcher to the mound who shows that while there is a threshold of limiting walks and striking batters in order to achieve success, other ingredients are still necessary. Andrew Cashner enters today's game with a 4.10 ERA, which is high considering his home ballpark. His DRA is 4.94 and about 20 percent worse than league average. And yet, Cashner has walked just 2.8 batters per nine and has struck out eight per nine. Part of the reason is because Cashner has allowed a lot of baserunners to score. His strand rate is just 61.5 percent on the year. That figure suggests he's due for some improvement, but his close to normal .312 BABIP against and just slightly above league average HR/FB suggest that Cashner's been fairly hittable this season.

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<th align="left">COLORADO ROCKIES</th>

<th align="left">SAN DIEGO PADRES</th>

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<tr><td class="td-last td-name">Charlie Blackmon - CF</td><td class="td-first td-name">Yangervis Solarte - 3B</td></tr><tr><td class="td-last td-name">DJ LeMahieu - 2B</td><td class="td-first td-name">Derek Norris - C</td></tr><tr><td class="td-last td-name">Troy Tulowitzki - SS</td><td class="td-first td-name">Matt Kemp - RF</td></tr><tr><td class="td-last td-name">Carlos Gonzalez - RF</td><td class="td-first td-name">Justin Upton - LF</td></tr><tr><td class="td-last td-name">Nolan Arenado - 3B</td><td class="td-first td-name">Jedd Gyorko - 2B</td></tr><tr><td class="td-last td-name">Ben Paulsen - 1B</td><td class="td-first td-name">Yonder Alonso - 1B</td></tr><tr><td class="td-last td-name">Nick Hundley - C</td><td class="td-first td-name">Will Venable - CF</td></tr><tr><td class="td-last td-name">Brandon Barnes - LF</td><td class="td-first td-name">Will Middlebrooks - SS</td></tr><tr><td class="td-last td-name">Eddie Butler - RHP</td><td class="td-first td-name">Andrew Cashner - RHP</td></tr></tbody>

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