The D-backs have agreed to a deal for right-hander Zac Gallen, a source told MLB.com's Mark Feinsand. Miami is set to acquire Arizona's No. 1-ranked prospect, Jazz Chisholm. The clubs have not confirmed.
Gallen, who is the the Marlins' No. 5-ranked prospect, is 1-3 with a 2.72 ERA in seven starts this season.