New York Jets wide receiver Wayne Chrebet (80) is helped off the field by doctor Elliott Hershman, left, and trainer David Price after suffering a concussion in the fourth quarter against the San Diego Chargers Sunday, Nov. 6, 2005 at Giants Stadium in East Rutherford, N.J. Chrebet was undergoing more tests Monday after hitting his head hard on the turf in the closing minutes against the Chargers, and it appears his career could be over.