The Dodgers needed a little insurance for closer Kenley Jansen, who returned to the lineup earlier this month after missing 11 games due to an irregular heartbeat. Madson certainly qualifies, as the 38-year-old right-hander boasts four saves this season and 91 for his MLB career. He is a good late-season pickup for Los Angeles.

With the Nationals in full-blown selling mode these days, it is no surprise that they decided to move on from veteran Madson just prior to the August 31 trade deadline for postseason-eligible players. Madson struggled in Washington this season (2-5, 5.28 ERA), while Istler is a 25-year-old reliever enjoying a solid Double-A campaign.

Madson may see more hold opportunities down the stretch with LA, and he may even be needed to close out some games. Therefore, his fantasy value should receive a short-term spike. Istler is not yet on the fantasy radar, but he might be able to reach the big leagues in a year's time.