Gardner caught just nine passes and had one touchdown with the Panthers this season in 10 games. He was Washington's first-round pick in the 2001 NFL draft, but was traded to the Panthers for a sixth-round draft pick in July.
Gardner's biggest season with the Redskins was in 2002 when he caught 71 passes for 1,006 yards. He production declined as did his commitment to football, according to some reports.
"We liked him coming out," Packers general manager Ted Thompson told the Press-Gazette. "He's a big guy, and we thought we'd take this opportunity to take a look at him."
For his career, Gardner has 236 catches for 3081 yards and 23 touchdowns.
Gardner ended his collegiate career as one of the most prolific receivers in Clemson history, with 166 receptions for 2,498 yards and 13 touchdowns. In his senior season, he tallied 58 catches for 1,050 yards (18.1 avg.) and seven TDs, all team highs.