Steelers Trade Mahan

[UPDATE] ESPN ticker reports that the Steelers received a 7th round draft pick for the trade.
The Pittsburgh Steelers announced today that they have traded backup center Sean Mahan to the Tampa Bay Buccaneers for an undisclosed draft choice in 2009.
During this year's training camp, Mahan competed with Justin Hartwig who was signed by the Steelers as a free agent. Prior to the final pre-season game, Coach Mike Tomlin made Hartwig the starter to which Mahan did not respond well to.
Darnell Stapleton now becomes Hartwig's backup. Stapleton made the team last year as an undrafted rookie from Rutgers.
Today's trade decreases the roster down to 52 players, so the Steelers will be able to add another player prior to Sunday's home opener against the Houston Texans.