This is gonna take a while: With little pop in his punches, Ivan Calderon expects to go 12 rounds every time he steps in the ring.
'Iron Boy': Boxing's best little secret
By Dan Rafael
How good is world junior flyweight champion Ivan "Iron Boy" Calderon, the Puerto Rican pint-sized boxing wizard?
The 2000 Olympian, who made 11 defenses of the 105-pound strawweight title before moving up to 108 to capture ...