During the 2017 season, John Sullivan was a rock-solid lineman for the Redskins. He joined the team shortly after the start of the season and assumed the backup center role. He stepped in just once as a starter in place of the injured Spencer Long and didn’t miss a beat. It was assumed that the team would do everything they could to keep him following the season as their backup center.
However, Sullivan elected to leave the Redskins to join the Los Angeles Rams. This made sense, as Sullivan had a clear path to a starting job with the Rams.