Carreno, originally known as Josue Carreno, signed with the Tigers out of Venezuela in 2008, when he was just 17. In 2012, he posted a 3.23 ERA and 1.17 WHIP at Low-A West Michigan in the Midwest League. He's a 6-1, 170-pound righthander; here's what was said about him on the Tigers website last month:
Among the biggest jumps in the Tigers' Top 20 from season's start to finish was a seven-spot vault just outside the top 10 for right-hander Marcelo Carreno, whose 9-8 record at Class A West Michigan belied a strong finish and high strikeout total over his final 10 starts.
He was the Tigers' No. 11 prospect. Pretty good haul, I'd say, in exchange for someone who barely spent a month in a Detroit uniform.