The Mariners acquired outfielder Mallex Smith from Atlanta, but then sent him to Tampa Bay along with infielder Carlos Vargas and left-hander Ryan Yarbrough.
Seattle also sent left-handed pitching prospects Luiz Gohara and Thomas Burrows to Atlanta and designated right-hander Cody Martin for assignment to make room on its 40-man roster.
Smyly is the centerpiece of the two trades as Seattle may have found a starting rotation solution. Smyly, 27, made 30 starts last season for Tampa Bay, throwing a career-high 175 1/3 innings and striking out 167. He was 7-12 with a 4.88 ERA.
Simmons, 26, made seven appearances last season while recovering from Tommy John surgery and threw just 6 2/3 big league innings. Before elbow issues, Simmons was 1-2 with a 2.91 ERA in 26 appearances during the 2014 season.Read more at CNSNews