The Nashville Sounds are expected to have a new Major League Baseball affiliation by the end of the week.

The Sounds and Oakland Athletics parted ways on Monday. The Sounds had served as the A's Triple-A affiliate since 2015.

At this point it appears the Sounds could become the Triple-A affiliate to either the Nationals or Rangers.

Nashville and Fresno are the only two Triple-A teams left without MLB affiliates, and the Texas Rangers and Washington Nationals are the only clubs without Triple-A affiliates.

The Brewers announced an affiliation with San Antonio on Tuesday, and the Astros are expected to announce an agreement with Round Rock, according to multiple media reports.

Sounds officials declined to comment on which team they might align with in the future.

The Sounds have been on the Triple-A level since 1985 and served as the Brewers' affiliate before (2005-14). In fact, that was the longest the Sounds have been connected to an MLB club.

The other affiliates in Triple-A have been the Tigers (1985-86), Reds (1987-92), White Sox (1993-97) and Pirates (1998-2004).

The Nationals have reportedly been in negotiations with the Sounds about an affiliation since the beginning of the month. The Nationals were most recently affiliated with Syracuse, which is forming a new relationship with the New York Mets.

Round Rock officially ended its affiliation with Texas on Monday and Rangers officials confirmed they are looking for a new Triple-A team.

The A's signed a new Triple-A agreement with the Las Vegas 51s of the Pacific Coast League through the 2020 season.

The Sounds are an attractive affiliate because they boasted the fourth-highest Triple-A attendance this past season. First Tennessee Park opened in 2015.

Reach Mike Organ at 615-259-8021 or on Twitter @MikeOrganWriter.