Well...let’s see...four neck surgeries in the last 18 months and 36 years-old might be indicators. And, while he is neither stupid nor in any difficulty financially, like other star professional athletes he may well be emotionally averse to leaving the game and giving up the limelight. If so, he wouldn’t be the first athlete to succumb. In Manning’s case, however, it might carry a very high price tag.
There are people with knowledge (vs.'righteous opinion') who are the right ones to advise whomever in investing in Manning, or not.
And I am also sure that there are like people with knowledge who are advising Manning as to whether or not to continue his playing career.
BUT, thanks for sharing.