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

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

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

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