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In a move to address their overall catching depth and aid in the production from the position at the big league level, the Mariners made a trade to acquire catcher Welington Castillo from the Cubs in exchange for right-handed reliever Yoervis Medina.

The team announced the trade on Tuesday morning.

Castillo, 28, was relegated to the third catcher on the Cubs this season with the acquisitions of Miguel Montero and David Ross in the offseason.  He had started just eight games at catcher this season, the rest of his appearances came largely as a pinch hitter.

He was hitting .163 (7-for-43) with a .583 on-base plus slugging percentage with two homers and five RBI. In 2014, Castillo hit .237 with a .686 OPS with 13 homers and 46 RBI. He had 107 strikeouts in 110 games.

From a defensive standpoint, Castillo is considered to above average with his arm and at blocking pitches. The framing metrics aren’t high on him. But basically he’s capable behind the plate.

The acquisition means that back-up catcher Jesus Sucre will be optioned to Class AAA Tacoma. Sucre was hitting .067 having started just six games. In four of the six starts, he was lifted for a pinch hitter and Zunino ended up finishing the game behind the plate.

It’s unlikely that Castillo will unseat starter Mike Zunino. But he does give the Mariners a better offensive option as a back-up catcher. Basically, there may not be a hesitancy to give Zunino an extra day off every so often.

Medina, 26, made 12 appearances with the Mariners this season, posting a 3.00 ERA with seven walks and nine strikeouts in 12 innings pitched before being optioned to Class AAA Tacoma on May 3. Medina was 1-0 with a 1.59 ERA in four appearances for the Rainiers this season. Last season, he appeared in 66 games and posted a 2.68 ERA with 60 strikeouts in 57 innings pitched.