Five former quarterbacks attempt to learn the knuckleball while competing for an invite to spring training with the Arizona Diamondbacks.

60 min . 2013-02-13

Four former quarterbacks remain in the competition to learn the knuckleball and attend Diamondbacks spring training.

60 min . 2013-02-14

Three former quarterbacks remain in the competition to learn the knuckleball and take part in Diamondbacks spring training.

60 min . 2013-02-20

Conclusion of the competition among former college quarterbacks attempting to learn the knuckleball and take part in Diamondbacks spring training.

60 min . 2013-02-21