You might still be putting 19 down when you write the date, sometimes it takes a few weeks to settle in, but we are officially in the year 2020. That means that we are dealing with expiring contracts for some people (players the Cowboys have picked up over the last few years) but notably the players drafted by the team in 2016.
Per the NFL’s current Collective Bargaining Agreement rookies that are drafted are given four-year contracts. Players taken in the first round have fifth-year options, but the majority of a draft class sees their deals expire after their fourth season with a team.