Some of the issues were provoked by Manning himself, who, according to sources familiar with the situation, persuaded some team officials to allow him to conduct unsanctioned workouts late in the season in an effort to push his way back onto the field. Before the Colts’ Week 16 game against the Texans, Manning, despite a severely weakened throwing arm, pushed to return to the field—but only in red-zone situations.
Given the many stories of just how weak his arm was, a Peyton package may have been a disaster. From there, one can imagine many scenarios preventing Manning from coming to Denver.
Thankfully, Jim Irsay did right by nixing Peyton's idea.