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1. Isaac Galloway, CF
Team: High Class A Jupiter
Galloway currently leads all Marlins affiliated players with 13 stolen bases. Not only is Isaac Galloway the top base stealer in the Marlins system, he might be the best athlete in the organization as well. At one time viewed as a first-round pick, Galloway fell to the Marlins in the 8th round of the 2008 MLB Amateur Draft after it became apparent just how raw of an athlete he was. Galloway only has 55 stolen bases in six seasons, but he missed almost all of the 2010 and 2012 seasons. Galloway might reach the majors one day as a fourth outfielder and pinch runner, but due to his unrefined mechanics and rough approach at the plate, he probably won't become the All-Star center fielder that scouts saw in high school. Nonetheless, Galloway is the top base stealer in the Marlins farm system due to his crazy athleticism and raw speed, even though he lacks the track record of some of the other players on this list.
2. Juancito Martinez, OF
Team: Low Class A Greensboro
Juancito Martinez is a very interesting prospect. He already has 48 career stolen bases (12 so far this year in the South Atlantic League) even though this is his first year in full-season ball. Martinez's ability is obvious. However, he needs to be careful with his speed. Martinez has already been thrown out seven times in 2013, which is more than twice as many times as he was thrown out in 2012, despite already playing in one-third as much games as he did in 2012. Hopefully, this is just an oddity and Martinez will continue to avoid being thrown out as he did in his past. If Martinez can stay on the field and become a more reliable option on the base-paths, it's not unreasonable to think he could steal around 50 bases in 2013.
3. Gorkys Hernandez, CF
Team: Triple-A New Orleans
The most well-known player on this list, Gorkys Hernandez is also the only one with major league experience. With 177 career stolen bases, Hernandez is the most refined base thief, aside from Juan Pierre, of course, in the Marlins organization. However, Hernandez only has seven stolen bases for Triple-A New Orleans in 2013 because he has struggled to get on-base. Also, he is the oldest player by a few years, on this list. Hernandez has the ceiling of a fourth outfielder down the line, but with the Marlins current outfield situation, they might take advantage of his speed at some point during the 2013 regular season.
4. Jesus Solorzano, RF
Team: Low Class A Greensboro
Jesus Solorzano is probably the top prospect on this list. Born in Venezuela, Solorzano is very toolsy, with the ability to hit for power and average, as well as play solid outfield defense. In 2012, Solorzano struggled with learning the ins and outs of stealing bases, going 7-for-13 on the basepaths. However, in a small sample size this year with Greensboro, Solorzano is 7-for-8 at stealing bases. In his first full season of minor league baseball, Solorzano has shown great progress. He could steal upwards of 30 bases this year.
5. Brent Keys, OF
Team: High Class A Jupiter
Brent Keys was probably the player in the Marlins farm system last year that surprised the most people. Selected out of high school by Miami in the 17th round of the 2008 draft, Keys hit .335/.394/.449 with 18 stolen bases for low Class A Greensboro last season. With only 48 at-bats for Jupiter in 2013, Keys has already stolen three bases in five attempts. Keys is probably the player on this list with the least raw speed, but he is very athletic and has had a lot of success on the base-paths in the past.