The Washington Nationals have finalized a one-year deal with Casey Janssen that includes a mutual option for 2016.

Janssen had spent his entire Major League career with the Toronto Blue Jays, going 29-24 with 90 saves and a 3.52 ERA since 2006.

Washington, which announced the agreement Monday, was in the market for a late-inning arm after trading Tyler Clippard, dealing Ross Detwiler to the Texas Rangers and allowing Rafael Soriano to become a free agent.