This isn't anything new. He's 37 years old. Even before the Maidana fight you could see he slowed down considerably, even compared to 5 years ago when he fought JMM.

That's life. You're in your physical prime in your 20s and early 30s, and then it goes downhill from there.

Roy Jones was 35 and 15 years into his pro career when he got caught by Tarver and Johnson. When Pernell Whitaker was in his mid 30s he was dropping fights and struggling with guys who had no business being in the ring with him. Floyd's well passed the "fast slickster" expiration date.