"I hope that those who have come to know me over the years will readily see that this is something that is uncharacteristic of me," Jennings wrote in a guest column for the New York Post. "I take full ownership of the fact that I didn't handle things as I should have. And for that, again, I truly apologize to my quarterback, to my coach, to my team, and to our fans."
Manning confirmed Monday that he purposely told Jennings not to score on first- and second-down run plays in the Giants' 27-26 loss with the sole intent of running more time off the clock to deprive Dallas of a chance at a comeback.
It did not work. Manning ended up throwing a clock-stopping incomplete pass on third down, the Giants settled for a field goal, and the Cowboys marched down the field to score the winning touchdown with seven seconds left. Manning later said he lost track of the number of timeouts the Cowboys had left.
After realizing his comments were making headlines, Jennings said he immediately called Manning to let him know that he had "no ill will stating what I did" and to apologize.
"I want to apologize from my heart for the negative light that I unintentionally cast my quarterback and friend Eli Manning in. I continue to have the utmost respect for him, and I have complete trust in his leadership," Jennings wrote in the Post. "I admit in retrospect that I should not have shared that information with the world. I chose to do so, and for that choice, I am truly sorry."
Jennings said Manning expressed his understanding and "wanted to put this fiasco behind us with no hard feelings."
"As professional competitors, our deep-rooted desire to win is usually our best friend. It can drive us to leave everything out there on the field," Jennings wrote in the Post. "But sometimes, if we are not careful, it can consume us enough to lead us, in the heat of a moment, to say things that only our souls should hear.
"We all just want to win. And I truly believe that I have learned a very valuable lesson about just how delicate a balance we must maintain in keeping ourselves and our team focused on the preeminent goal of winning games."
Coughlin declined to address the topic Wednesday, saying, "We've had the conversations, and we're on to Atlanta."
New York hosts the Falcons on Sunday.
ESPN Staff Writer Dan Graziano contributed to this report.
Jennings apologizes to Eli, Coughlin, team and fans
First Take's Stephen A. Smith and Skip Bayless react to the news that New York Giants RB Rashad Jennings apologized to QB Eli Manning, coach Tom Coughlin and to the rest of the organization for comments he made earlier in the week.
Gruden: Giants put too much faith in Eli
ESPN Monday Night Football analyst Jon Gruden says the New York Giants put too much trust in Eli Manning making the right decision at the end of the Cowboys game.
Stephen A.: Jennings might be right, but it was dumb to say
First Take's Stephen A. Smith discusses why he believes it was wrong for New York Giants RB Rashad Jennings to say that QB Eli Manning told Jennings not to score in the final drive against the Dallas Cowboys.
Graziano: Eli, Coughlin made critical mistakes
ESPN Giants reporter Dan Graziano discusses the decision-making and time-management errors made by Giants QB Eli Manning and coach Tom Coughlin against the Cowboys.