Most interceptions thrown in a season:
George Blanda, 42 in 1962
Vinny Testaverde, 35 in 1988
Frank Tripucka, 34 in 1960
based on calculations from the 2008 season, the average number of interceptions thrown by starting NFL quarterbacks is .83.
In the 2016 NFL season, Philip Rivers had the most interceptions among quarterbacks.
Peyton Manning
You can check out all interceptions thrown by an NFL quarterback on espn. You have to check out the quarterback statistics and can look at all of the seasons the quarterback played. You can also compared various quarterbacks together.
Tony Romo in 2007 and Matt Ryan in 2012
Through Week 7 of the 2010 NFL season, Brady has never thrown 5 interceptions in an NFL game. He has thrown 4 INTs in 5 NFL games, the last time being in the 2006 season against the Colts.
Brett farve for a fact has thrown the most touchdowns. But I'm not sure if he threw the most interceptions as well
For the 2010 regular season, that was Eli Manning of the New York Giants with 25.
Manning
The quarterback that has the most interceptions is Brett Favre, he has 22 interceptions
As of the 2008 season: 1) Brett Favre - 288 2) George Blanda - 277 3) John Hadl - 268 4) Vinny Testaverde - 267 5) Fran Tarkenton - 266
Dan Fouts. Fouts threw 242 career INTs, 12th most overall through the 2010 season, and never led the NFL in interceptions for a season. The closest he came was 1979 when he threw 24 INTs and the NFL leader was Brian Sipe with 26.