Rodriguez, 35, was released by the Tigers on Friday after posting a 7.82 ERA and giving up nine homers in 25 1/3 innings this season, blowing six of his 13 save opportunities. It has been a disappointment after a strong 2016, when he posted a 3.24 ERA with 44 saves and an 8.02 K/9 rate.
However, the Nationals are in desperate need of bullpen help. Their relievers carried a 4.