Sorensen signed a contract with the Saints on Friday, Amie Just of The New Orleans Times-Picayune reports.
Sorensen is expected to move into a reserve role Sunday in Washington, with Juan Thornhill replacing him as the Chiefs' starting free safety, Ian Rapoport of NFL Network reports.
Sorensen had nine solo tackles during Kansas City's win over Philadelphia in Week 4.
Sorenson posted seven tackles (five solo) and a pass breakup in Sunday's 30-24 loss to the Chargers.
Sorensen re-signed with the Chiefs on a one-year, $2.4 million contract Thursday, Nate Taylor of The Athletic reports.
Sorensen racked up 91 tackles (68 solo) over 15 games and added a trio of interceptions during the 2020 campaign.
Sorensen recorded 10 tackles (eight solo) and a forced fumble in Sunday's 33-31 win over the Panthers.
Sorensen registered nine tackles (eight solo) in Sunday's 35-9 victory over the Jets.
Sorensen had five tackles (two solo) and one interception during Monday's 26-17 win over the Bills.
Sorensen finished 2019 with 57 tackles (44 solo) and two interceptions over 16 regular-season games