Despite a series of shaky outings last season as a rookie, lefty Dillon Overton still seemed a good gamble to the Mariners in their ongoing quest to deepen their organizational pitching depth.

The Mariners acquired Overton, 25, on Thursday from Oakland in a trade for minor-league catcher Jason Goldstein. The move came one day after the Athletics designated Overton for assignment.

"Overton has always been a strong performer and maintains two options," general manager Jerry Dipoto said. "He’s an excellent strike-thrower with above-average feel and a solid curveball/changeup combination.

"I’m glad we were able to add him."

To clear space for Overton on their 40-man roster, the Mariners designated veteran catcher Jesus Sucre for assignment. If Sucre clears waivers, he is likely to be sent to Triple-A Tacoma on an outright assignment.