Giacomini, a 6'7", 311-pound player from Louisville, was a fifth-round selection (No. 150 overall). He started all 12 games at right tackle in 2007 for the nation's No. 6-ranked offense.
As for Sitton, the Milwaukee Journal Sentile reports, "The 6'3-1/2", 324-pound Sitton played both guard positions and right tackle in college, but has mostly worked at right guard with the Packers, playing behind starter Jason Spitz."
Yesterday, the Packers released offensive lineman Cameron Stephenson, reports Tom Silverstein. With this transaction, in conjunction with their current signings of four of the nine draft picks, the Packers currently sit at exactly 80 signed players on their roster.
For every rookie that is signed to a contract from here on out, the Packers must release a player to make room for them on the roster. This also goes for running back Ryan Grant, who is not currently under contract.