Wuerffel completed 161 of 260 passes for 2,042 yards and 25 touchdowns, with seven interceptions, for the Fire, who beat the Scottish Claymores in Sunday's World Bowl at Frankfurt, Germany.
He's the fifth quarterback on Green Bay's roster heading into preseason training camp.
He played in 16 games, starting six, for the Saints from 1997-99, and became a free agent in February when they did not make him a qualifying offer. He completed 126 of 258 passes for 1,404 yards and nine touchdowns, with 16 interceptions, for New Orleans.
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