KANSAS CITY, Mo. — The Seattle Mariners acquired All-Star first baseman Yonder Alonso from the Oakland Athletics on Sunday for minor league outfielder Boog Powell.
The Mariners, who have not been in postseason play since 2001, entered a Sunday doubleheader at Kansas City, trailing the Royals by 1½ games for the second wildcard spot.
Alonso, 30, is hitting .266 with 17 doubles, 22 home runs and 49 RBI. He ranks second among American League first baseman with a .527 slugging percentage.
Alonso, a left-handed hitter, could platoon at first base with Danny Valencia.