The WBO already had plan B ready when it decided to strip Sergio Martinez (center) of his 160-pound title.

That plan was put into action on Monday, according to numerous published reports as talented Brooklyn prospect Daniel Jacobs (20-0, 17 KOs) will take on Russia's Dmitry Pirog (16-0, 13 KOs) in a 12-round bout on the undercard of the Juan Diaz-Juan Manel Marquez undercard on July 31 at the Mandalay Bay.

Boxingscene.com reported the two camps were in discussions on Sunday. The deal was apparently finalized on Monday.

The WBO's decision could have a ripple effect in the division. Martinez seems likely to stay at 160 pounds for a while. Martinez' promoter Lou DiBella reportedly wants a rematch with Paul Williams. But Williams doesn't seem ready to give him one now. 

Williams scored a majority-decision win over Martinez last December. Both fighters were knocked down in the first round.

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There are several other opponents DiBella has in mind for Martinez, but according to AOL Fanhouse, HBO only wants to see Martinez fight Williams right now.

The only fight that HBO will discuss with me in regard to Sergio is Paul Williams  and, right now, Paul Williams doesn't really want to discuss the fight," DiBella said to AOL Fanhouse's Lem Saterfield.