Imagine what could have been with Peyton Manning and the San Francisco 49ers?
Posted by Niners Nation: A San Francisco 49ers Blog on
Peyton Manning retirement brings back one of the ultimate 49ers hypotheticals
The Denver Broncos and Indianapolis Colts quarterback is calling it a career, and it makes me think back to a hypothetical that is on the short list of biggest in 49ers history.
ninersnation.com
