By Jake Donovan

Julio Cesar Chavez Jr. is set for his first fight under the Al Haymon advisory banner. The second-generation boxing star and former middleweight titlist returns to the ring following a 13-month hiatus, as he takes on perennial Top 10 light heavyweight contender Andrzej Fonfara. 

Their bout headlines live on Showtime from StubHub Center in Carson, California, to be fought at a maximum catchweight of 172 lbs. Both fighters did their part to keep the main event afloat, at least at the scales. 

Chavez Jr. tipped the scales at 171.6 lbs., with his every step and look cheered wildly by adoring fans on hand. Fonfara - just 11 months removed from a failed title bid versus Adonis Stevenson - came in at 171.4 lbs., his lightest weight since moving up to the light heavyweight division for good in 2010.

A $100,000 per pound penalty was at stake, in the event either fighter missed weight. 

Chavez Jr. (48-1-1, 32KOs) appeared to have his career back on track following a repeat win over Bryan Vera last March. The feat was much cleaner than their first fight more than five months prior, when the wildly popular Mexican first struggled at the scales - to the point of having the fight contract modified to a weight befitting his soft physique - and then in the ring in scoring a controversial decision.

The bout also followed a year-long suspension after having tested positive for marijuana following his title-losing effort to Sergio Martinez in Sept. ’12, his lone loss to date. 

Following the second win over Vera, Chavez Jr. was on target to face Gennady Golovkin. The fight was squashed when Chavez Jr. and Top Rank couldn’t agree on the length of the existing promotional contract, leading to a lengthy hiatus and drawn out lawsuit before freeing up and now officially on board with Haymon. 

Fonfara (26-3, 15KOs) came up just short in his lone title bid, rising from the canvas to floor Stevenson only to drop a competitive decision in their World light heavyweight clash last May. 

The 27-year old Polish slugger has since rebounded with a 10-round points win over Doudou Ngumbu last November in his adopted Chicago home land.

In the televised co-feature, unbeaten hard-hitting prospect Amir Imam faces Walter Castillo in a 10-round junior welterweight showdown. 

Imam tipped the scales at 140 lbs. for his second straight Showtime appearance; Castillo weighed 138 lbs, making his Showtime debut.

Jake Donovan is the Managing Editor of BoxingScene.com. Twitter: @JakeNDaBox