A 44th-round pick by the A's in 2011, Bostic has enjoyed a strong season with the Pirates' Triple-A Indianapolis affiliate. In 78 games, his slash line was .295/.351/.436 with 24 doubles, three triples, four home runs and 32 RBIs.
Bostick also has appeared in two games with the Pirates, going hitless in two at-bats. In 2017, the right-handed-hitting and throwing outfielder appeared in 20 games with Pittsburgh, with a slash line of .296/.406/.370 in 27 at-bats.
The Marlins are in need of outfield depth at Triple-A now that Magneuris Sierra, Isaac Galloway and Rafael Ortega have been promoted to the big leagues.