Brook defeated Porter for the championship via 12 round majority decision .
Shawn Porter was ordered by the IBF to make his next mandatory defense against Kell Brook ( 32 - 0 , 22 KOs ) .
Kell Brook defeated Shawn Porter for the championship via 12 round majority decision .
Shawn Porter was ordered by the IBF to make his next mandatory defense against Kell Brook ( 32 - 0 , 22 KOs ) .