The Bills signed Johnson to a reserve/future contract Monday, Chris Brown of the team's official site reports.
Johnson caught 36 passes for 360 yards over the first two seasons of his career with Arizona. The 26-year-old then was waived ahead of the 2021 season, and he spent time with numerous teams over the past two years before landing with the Bills' practice squad Oct. 11. Johnson, who hasn't appeared in a game since 2020, now will look to carve out a reserve role with Buffalo heading into the 2023 campaign.