The Jets announced the moves Tuesday, but did not immediately announce any corresponding transactions. New York has 50 players on its roster, leaving them three spots they could fill before the game Thursday night at MetLife Stadium.
Hill was signed by the Jets last month after Santonio Holmes was lost for the season with a foot injury. He was released a few weeks later, but re-signed Nov. 6. He had two catches for 15 yards and a touchdown in three games with the Jets.
Dowtin was signed off the practice squad last month and had four special teams tackles.