First off, he was demoted to the third string offensive line. "The No. 2 offensive line was (left to right): Orrin Thompson, Allen Barbre, Junius Coston, Josh Sitton and Ryan Considine," reports Tom Pelissero of the Green Bay Press-Gazette.
It's a little discouraging to see that the undrafted Considine was the right tackle instead of Giacomini who was drafted in the fifth round.
Then the Louisville product further struggled in one-on-one pass blocking drills.
"Rookie offensive tackle Breno Giacomini had a rough stretch in the second session," reports the Green Bay Press-Gazette. "Giacomini, who appears to back-pedal too much in pass coverage, was called on to take four consecutive snaps. Montgomery beat Giacomini on two straight bull rushes. Then Giacomini fought to a draw with Jason Hunter before being beaten by Hunter on the next snap."
It was only the first day of camp so we're willing to give Giacomini a pass, but it just wasn't a good way to start.