The Mariners, in search of bullpen help, finalized a deal to acquire lefty reliever Caleb Ferguson from the Pirates in exchange for minor leaguer Jeter Martinez.

The Pittsburgh Pirates have traded left-handed reliever Caleb Ferguson to the Seattle Mariners. The deal was first reported by MLB.com’s Mark Feinsand and others before being announced by the Pirates on Wednesday night. Pittsburgh acquired right-handed pitching prospect Jeter Martinez in a one-for-one deadline deal.

The Seattle Mariners acquired left-handed reliever Caleb Ferguson from the Pittsburgh Pirates on Wednesday, giving their bullpen another arm as they make a playoff push.