The A's acquired veteran reliever Fernando Rodney from the Twins on Thursday in exchange for Minor League right-hander Dakota Chalmers.
Rodney, 41, appeared in 46 games for Minnesota in his first season with the club after signing a one-year, $4.5 million deal in the offseason that included a team option for 2019. Rodney has a 3.09 ERA and 25 saves this season, his 16th in the Majors. He had a 4.23 ERA and 39 saves in his lone season with the D-backs in 2017.
With the acquisition, the A's, who currently occupy the second American League Wild Card spot, have added three relievers via trade this season to bolster their bullpen. In addition to Rodney, Oakland acquired closer Jeurys Familia from the Mets in July, and right-hander Shawn Kelley from the Nationals earlier this month.
The Twins entered the season expecting to contend for a second straight postseason berth, but are 11 games behind the Indians in the AL Central and 14 1/2 games back in the AL Wild Card race.
Chalmers, 21, was a third-round pick by the A's in the 2015 Draft. He appeared in two games (one start) this season for Class A Beloit, giving up an unearned run on three hits, but walking eight while striking out 10. In 10 appearances (five starts) for Beloit last season, he posted a 4.34 ERA.
Although Rodney was dealt after the July 31 non-waiver Trade Deadline, by being acquired before Aug. 31, he would be eligible for the A's postseason roster.