The Panthers hope Testaverde will be ready after a five-day crash course. With Jake Delhomme set to undergo season-ending elbow surgery and David Carr missing practice and walking gingerly Wednesday with a back injury, Testaverde could be Carolina's best option.
"He's a guy we were fortunate enough to find at this point in the season," coach John Fox said.
Joining his sixth franchise, Testaverde has played in 226 games with 208 starts. The No. 1 overall pick in the 1987 draft was cut by New England before the start of the season.
"He brings experience," general manager Marty Hurney said. "He throws the ball extremely well. He's a fierce competitor."