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A’s Acquire Rosario; Designate Mitchell

November 28, 2012

I sort of called it last week when the A’s filled their 40-man roster in advance of the Rule V draft and that I expressed surprise that while Brandon Hicks and Jim Miller were DFA’d, Jermaine Mitchell was not despite being a very aged prospect. Well the day has come and today Mitchell was designated for assignment as the A’s acquired right-handed pitcher Sandy Rosario from the Boston Red Sox in exchange for a player to be named later or cash considerations. Rosario was claimed off of waivers by the Red Sox in October from Miami.

Rosario, a 27-year old from the Dominican Republic, has pitched a grand total of seven and two thirds innings of MLB baseball all with the Marlins spread across 2010-2012, during which he has posted a 15.26 ERA with a 6.58 FIP, 4.7 K/9, 3.5 BB/9 and 2.4 HR/9. Of course remember this is all of seven and two thirds innings. Rosario spent 2012 at four separate levels of baseball this year spending time with the Jupiter Hammerheads of the Florida State League, Jacksonville Suns of the Southern League, New Orleans Zephyrs of the Pacific Coast League and finally the big league club in Miami. In MiLB ball this year, he posted a combined 1.99 ERA with 7.4 K/9, 0.6 BB/9 and 1.4 HR/9 across just 31 2/3 innings, the lion’s share coming with New Orleans, and in relief (he had two starts out of 25 appearances). SoxProspects.com says this of Rosario,

“Reliever throws a low-to-mid 90s four-seam fastball and a low-80s slider. Fastball is on the straight side and slider is average but flashes potential. Showed excellent control in 2012. Currently lacks an out pitch to consistently retire major league caliber hitters.”

Rosario does have an option remaining so the A’s can send him back down to Sacramento to learn an out pitch. It seems likely given his status on the 40-man roster that he will see time in Oakland this year if he remains with the club going into the season, as players like this have a tendency to find themselves shuttled around some.

To make room for Rosario the A’s DFA’d Mitchell. Perhaps Mitchell gets picked up by someone or is traded like Hicks was, but I have no problem envisioning him clearing waivers and returning to the A’s. That said, the A’s seem to have zero space for him. Even if the A’s suffer injuries to MLB outfielders guys like Michael Taylor figure to feature more highly than does Mitchell. Mitchell, a fifth round draft pick out of UNC-Greensboro back in 2006, spent all of 2012 with the River Cats posting a .252/.345/.386 slash line with six home runs, and 15 steals in 22 attempts. His wOBA was a pedestrian .331 and his wOBA and his wRC+ an underwhelming 92.

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