On June 19, Wilson was claimed off waivers by the Seattle Mariners. While with the Seattle Mariners, he was affectionately nicknamed "The Paperboy" by Ken Griffey Jr. With the Mariners in '09 he hit .250 with eight doubles, one triple, three home runs and 10 RBIs in 45 games giving him a combined average of .219 with 42 hits in 72 games between Arizona, San Diego and Seattle.
On June 19, Wilson was claimed off waivers by the Seattle Mariners. During his time with the Mariners, he earned the affectionate nickname "The Paperboy" from Ken Griffey Jr. With the Mariners in '09, he achieved a batting average of .250 with eight doubles, one triple, three home runs, and 10 RBIs in 45 games, resulting in a combined average of .219 with 42 hits in 72 games across Arizona, San Diego, and Seattle.