The Buccaneers signed Sills on Tuesday, Scott Smith of the team's official site reports.
Sills logged career-best numbers during his only season with the Falcons in 2025, securing 18 of 36 targets for 191 yards and two touchdowns across 17 regular-season appearances. The 6-foot-3, 211-pound wideout will now work to secure a role on Tampa Bay's crowded wide receiver depth chart.