"Actor Rob Lowe caused a stir two weeks ago when, via Twitter, he passed along a rumor he heard that Colts quarterback Peyton Manning was retiring.

Those in the Manning family have responded with questions over how Lowe would even know that information. And, on Monday, the oldest Manning brother expressed his belief that the opposite is true, that his younger brother is indeed set on adding to an already illustrious career.

When I asked Cooper Manning if Peyton is "determined," he responded quickly, saying, "I think that's a great word for it."

"What I do know is Peyton is going to do every single thing a human being can possibly do to get ready to play again," Cooper Manning said from his office in New Orleans. "Where, when and how he'll play, that's all up in the air. But as far as his body goes, Peyton's smart, he'll know what to do. Anyone predicting what will happen now going forward is just wasting their breath. But he is working as hard as anyone can work to get out there again.""