[5] On August 6, 2016, the Marlins traded Seymour and Michael Mader to the Atlanta Braves for Hunter Cervenka.

However, Seymour was suspended and removed from the team's roster before the Arizona Fall League began play.

[13] On May 10, 2018, Seymour signed a minor league contract with the Miami Marlins and was assigned to the High–A Jupiter Hammerheads.

[18] On March 3, 2021, Seymour signed with the Kane County Cougars of the American Association of Professional Baseball.

On February 17, 2022, Seymour signed with the Charleston Dirty Birds of the Atlantic League of Professional Baseball.

On August 19, 2022, Seymour was traded to the Long Island Ducks of the Atlantic League of Professional Baseball.