One of Dipoto's main priorities

Martin's defense remained strong in 2015 with 15 defensive runs saved, but he hit just .219/.264/.313 and the Rangers considered not tendering him a contract. But for the Mariners, he's a big upgrade defensively; the Mariners were last in the majors in 2015 with minus-45 defensive runs saved in the outfield. Martin turns 28 in April and still has three years left of team control. If he can bounce back with the bat, the Mariners will fill a position that has been problematic for the past several seasons, ever since couldn't stay healthy. was a disappointment in 2014 and then was traded to the Cubs in 2015 as he headed into free agency.

One of Dipoto's main priorities was to get more athletic in the outfield, which means more  at DH and at first base instead of a corner outfield position. This is one of those acquisitions that may not work if Martin flops with the bat, but there's upside here for the Mariners, making it a deal that is worth the risk.

For the Rangers, they acquire a solid reliever for a guy who didn't figure into their plans for 2016, so it's a good trade for them as well. Wilhelmsen has served as the Mariners' closer at various times in the past four years, although his best season came in 2014 when he served in a setup role and posted a 2.27 ERA. When Wilhelmsen broke out in 2012 with 29 saves, he was primarily a two-pitch pitcher, with a mid-90s fastball and hammer curveball. But he's lost feel for the curve in recent seasons and only threw it 10 percent of the time in 2015 after throwing it 28 percent of the time in 2012.