Froch is 31. Let's see how his resume compares with the recently retired Calzaghe's by the time they were both 31. These are the top 5 fights each of the boxers had had by this time.

FROCH:
Jean Pascal
Robin Reid (37 yrs old)
Brian Magee
Henry Porras
Tony Dodson (for the British title, Dodson had already lost 3 fights, 2 by TKO)


CALZAGHE:
Chris Eubank (had never hit the canvas, Calzaghe had him on his arse in the 1st round)
Charles Brewer (former IBF title holder)
Robin Reid (28 yrs old and in his prime, Calzaghe edged a points decision)
Byron Mitchell (Dangerous fighter, went on to TKO both Scott Pemberton and Veit following his loss to Joe)
Mark Delaney (was 21 - 0 when Joe fought him for the British title)