Morse, who started his career with the Mariners, played in 102 games last year after missing the first two months of the season with a back injury, and hit .291 with 18 home runs and 62 RBI, a .321 on base percentage and .470 slugging percentage. The 30-year-old Morse enjoyed his best season in 2011 when he hit .303 with a .910 on-base plus slugging percentage and hit 31 home runs.
Jaso, who figured to split time behind the plate with Jesus Montero--the only catcher currently on the Mariners' 40-man roster--hit .276 with 10 home runs and 50 RBIs in 108 games last year.
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