(Florham Park, NJ) -- Former 49ers coach Greg Knapp is dead following a cycling accident near his home in California. The 58-year-old had been in critical condition since Saturday. He was set to serve as the Jets' passing coordinator after previously working with Hall of Fame quarterbacks Peyton Manning and Steve Young. Reports indicate Knapp had been preparing to head east for training camp in the days leading up the accident. Knapp began his NFL coaching career in San Francisco, working for the team in a variety of roles from 1995-to-2003.