From what I remember about his time in the majors, Merrero looked like a freaking slap hitter with zero power. Do not want.
100 ABs isn't a large enough sample size to reach any conclusions. He was averaging 14-18 HRs a year with around a .450 SLG at each level before he got hurt, but remember, he was only 22 when he got called up.
I wouldn't be as worried about pre-injury Marrero as I am with post-injury Marrero.