During the 2015 NFL Draft, the Pittsburgh Steelers added a pair of cornerbacks to their depth chart within the first four rounds. With their second-round selection, the team drafted Senquez Golson. Two rounds later, their first pick on the third day of the draft went to Doran Grant.
The Steelers have a history of drafting players in pairs and allowing them to compete in-season, and I certainly expect that to be the case for these two defensive backs.
Most famously, head coach Mike Tomlin was known to use the phrase “two dogs, one bone” to describe the weekly competition for rookie wide receivers Emmanuel Sanders and Antonio Brown in 2010 for a helmet on game day, although eventually they both often got a helmet depending on the game circumstances and injuries.