Matt Hasselbeck Matt Hasselbeck, 38, is the oldest QB on a 2013 NFL roster—backing up Andrew Luck, 24, in Indianapolis.

Football fans knows it’s a young man’s game.

But that didn’t stop Jeff Garcia, 43, from hitting up the Cleveland Browns for a tryout.

It also didn’t stop the St Louis front office from calling up the Silver Fox himself—Brett Favre, 44—after Sam Bradford went down to a season-ending knee injury.

The NFL may want to establish baseline sanity testing for all front office executives as well after this revelation.

(Dateline, St Louis: Team officials sidelined GM Les Snead by revoking phone and computer access until he clears baseline sanity testing after they learned he called up Favre and he wasn’t kidding…seriously…not kidding.)

There is precedent for luring an old fart—relatively speaking, of course—out of retirement and onto the gridiron:

Steve DeBerg was the oldest QB to start an NFL game—at 44 years, 279 days—in a ’98 game between his Atlanta Falcons and the New York Jets.

Vinny Testaverde was the oldest QB to win a game—at 44 years, 27 days—in a ’07 matchup between his Carolina Panthers and the San Francisco 49ers.

George Blanda was the oldest QB in a postseason game—at 43 years, 108 days—in the ’70 AFC Championship game between his Oakland Raiders and the Baltimore Colts. Blanda continued as the Raiders kicker—and occasional QB—until he retired just before the ’76 season at 48—still the record for the oldest player in NFL history.

After sifting through the Garcias, Trent Greens, Gus Frerottes and Brad Johnsons, I narrowed the list down to five geriatrics that could still help an NFL franchise…