The Arizona Diamondbacks have acquired rookie right-hander Zac Gallen from the Miami Marlins for minor league shortstop Jazz Chisholm.

Gallen, who turns 24 on Saturday, is 1-3 with a 2.72 ERA in seven starts since making his major league debut June 20. Gallen pitched at North Carolina and was a third-round draft choice by the St. Louis Cardinals in 2016.

Chisholm, 21, was rated the Diamondbacks' No. 1 prospect by MLB.com. He batted .204 with 18 homers and 13 stolen bases this season for Double-A Jackson. The native of the Bahamas is a career .253 hitter in the minors with 53 homers in 292 games since 2016.