The Seattle Mariners have acquired right-handed relief pitcher Shawn Armstrong in a trade with the Cleveland Indians, according to the club. In exchange, the Mariners sent the Indians international slot money. With the addition of Armstrong, Seattle’s 40-man roster is now at 38. Armstrong appeared in 21 games out Cleveland’s bullpen last season, going 1-0 with a 4.38 ERA over 24 2/3 innings of work. He allowed 23 hits and five home runs while striking out 20 batters. He also spent some time at Triple-A Columbus, where he went 1-1 with a 3.07 ERA across 28 relief outings. The 27-year-old, who played his college baseball at East Carolina University, was originally selected by the Houston Astros in the 33rd round of the 2008 MLB June Amateur Draft.