The Buccaneers did not make an official announcement on Thursday and in the past have waited until all of their Future free agents are signed before making an announcement.
Spiller also confirmed the signing during an interview with the Natchez (Miss.) Democrat and through a release from the Alcorn State Sports Information Department.
Spiller was a four-year starter for the Braves and left the school with the record for career receiving yards (2,917). He also left tied for second in touchdown receptions (23) and third in receptions (129).
Spiller also has experience as a kickoff returner with the Braves, as he earned first-team all-Southwestern Athletic Conference honors at that specialty position in 2005 after returning 28 kicks for a 27.1-yard average and two touchdowns in 2005. He was also named first-team All-SWAC as a wide receiver in 2004 after catching 50 passes for 1,111 yards and nine touchdowns.
The Buccaneers will seek to identify a kickoff returner that can compete with incumbent Micheal Spurlock this offseason.
The Buccaneers extended Spiller an invitation to their rookie camp last May, but they did not offer him a contract.
Spiller is the eighth Future free agent to sign with Tampa Bay since the offseason ended. The others are WR Cortez Hankton, TE Daniel Fells, DB Darrell Hunter, DE Marquies Gunn, DB Marcus Hamilton, OG Brian Johnson and OT Dennis Roland are the others.
Future free agents do not count against the Buccaneers' roster until March.
Listen to Bucsblitz.com's Matthew Postins during the offseason with former Buccaneers linebacker Scot Brantley on WHBO 1470 ESPN Radio in Tampa and Clearwater from 3-6 p.m. If you miss the show, check out Bucsblitz.com's exclusive team media center for Postins' archived appearances.
Matthew Postins covers the Buccaneers for Bucsblitz.com and the Charlotte (Fla.) Sun-Herald. He is a member of the Pro Football Writers Association, and his coverage of the Buccaneers has won numerous state and national awards.