Wilson, 27, will make his first appearance in a Major League uniform on Tuesday when the Mariners open a three-game series in Baltimore. He was hitting .381 with four home runs and 14 RBIs for the Rainiers and has been in the Mariners' Minor League system since 2001, when he was a second-round pick in the First-Year Player Draft.
Wilson gives manager Eric Wedge a right-handed option off the bench and could help out in left field or at designated hitter. The Mariners have won eight of their past 12 games, but they continue to struggle at the plate, having scored just 18 runs over their past eight games.
The 6-foot-2, 245-pound Wilson, who turned down a football scholarship to Oklahoma when he signed with the Mariners, hit 17 home runs in Tacoma and eight for Double-A West Tenn last season.
Langerhans, 31, is a nine-year Major League veteran who has been with the Mariners the past three seasons. He was hitting .173 in 52 at-bats for Seattle, with three home runs and six RBIs. Langerhans has hit a combined .200 with nine home runs and 20 RBIs in 260 at-bats in his three years with Seattle.
The Mariners will have 10 days to trade, release or outright the contract of Langerhans, who made the team as a non-roster invitee this spring.