Julio Cesar Chavez Jr., left, and Andrzej Fonfara pose after they weighed in Friday for their fight Saturday at StubHub Center in Carson/Photo by Gene Blevins, Los Angeles Daily News

Julio Cesar Chavez Jr. could not answer the bell for the 10th round Saturday night at StubHub Center, Andrzej Fonfara of Poland stopping Chavez via ninth-round technical knockout.

Chavez told trainer Joe Goossen after the ninth round to stop the fight, that there was something wrong with his leg. But Chavez never mentioned a leg injury during a post-fight interview inside the ring. Chavez was beaten to the punch by Fonfara all the way through, getting decked by Fonfara in the ninth round ahead of the fight being stopped between rounds.

It was the first fight at light heavyweight for Chavez (48-2-1) , the former middleweight champion from Mexico. Fonfara (27-3)  was ahead by seven, seven and nine points at the time. It was Chavez’s first fight in 13 months.

In other action: Lucas Matthysse (37-3) of Argentina won a 12-round majority decision over Ruslan Provodnikov (24-4) at Turning Stone Casino in Verona, N.Y. One judge had it even 114-114 while the other two had Matthysse ahead 115-113 and 115-113.