Jameis Winston Sings Happy Birthday Remix to Eli Manning in Viral 'ManningCast' Video

New York Giants quarterback Jameis Winston serenaded Eli Manning with his own version of "Happy Birthday" on the ManningCast of the Seattle Seahawks' 13-3 win over the San Francisco 49ers on Saturday.

Winston is on the verge of closing out his first year with the Giants, the same team that Manning helped lead to a pair of Super Bowl victories during his 16-year tenure in New York.