Since he first won the welterweight title, he's taken, in addition to who knows how many shots in training, 875 strikes in competition, per the official statistics, with nearly half—412—now having come in his last three bouts.

This January will mark GSP's tenth year in the UFC. At 32, if the level of competition is rising, and his skills at age 32 are diminishing, and the amount of punishment he is taking is accelerating, if he wants to retire rich and at the top, then perhaps now is the time.