Kowalski, who played at Villanova, started over 40 games at tackle during his college career. The 6'4", 305 pound lineman might transition to a different spot in the NFL, however. His frame and weight are similar to that of JC Tretter when he first joined the Packers out of Cornell in 2013. As such, Kowalski will probably train at a number of positions during training camp.
The move puts Green Bay's roster right at the 90-man limit. Kowalski will be the team's 16th offensive lineman, a number that will eventually be trimmed roughly in half by the time the 2015 regular season rolls around.