Drafted in the 29th round (887th overall) by the Miami Marlins in 2010.
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Rosa attended Washington High in the Bronx, N.Y.--alma mater of Manny Ramirez--and was cut from his high school baseball team three times before sticking. He played at two junior colleges, one year at Wallace State (Ala.) CC and another at Odessa (Texas) JC before transforming himself into one of the better power prospects in the system. He followed up a 23-homer campaign at hitter-friendly low Class A Greensboro in 2013 with 13 at high Class A Jupiter in 2014, plus six more (including the postseason) during a promotion to Double-A Jacksonville. Rosa's focus in 2014 was to do more than just use the natural loft in his lefthanded swing to launch homers, and he improved at developing more of a line-drive swing. He has some feel for hitting, has added polish to his approach and isn't a strikeout machine. However, he is a below-average runner and subpar first baseman. Scouts panned Rosa's footwork at first base and think ultimately he fits best as a DH. He will return to Jacksonville to begin 2015.
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