Updated

Las Vegas, NV (SportsNetwork.com) - Floyd Mayweather took a unanimous decision over Marcos Rene Maidana to retain his WBC Welterweight title and remain undefeated on Saturday night.

Mayweather (47-0, 26 KOs) took two scores of 116-11, and the other at 115-112 to defeat Maidana (35-5, 31 KOs) for the second time in four months. In the previous fight in early May, Mayweather won two scorecards with the other card showing a tie score.

Mayweather danced around the ring for much of the early part of the fight, avoiding Maidana's punches and using counters to keep Maidana honest, especially with some hard, straight rights.

In the fourth round, Maidana got Mayweather on the ropes and was swinging away, connecting a straight right to the head and a few body shots.

The next few rounds didn't see much, but in the eighth Mayweather shook up Maidana with hard right to the head.

While the two were jammed up in the ring, Maidana had his head bent down and Mayweather was smothering his face with his left hand. Mayweather then pulled the hand back and indicated he had been bit by Maidana.

The referee stopped the fight with 22 seconds left in the eighth round to check out Mayweather's glove, then sent him to his corner to get checked out before going to Maidana's corner to tell them what happened.

It was Maidana again in the refs cross hairs as he had a point deducted in the 10th round for giving Mayweather a forearm while they were tangled up in the center of the round.

Clearly behind, Maidana gave it everything he had in the final rounds in an attempt to knockout Mayweather, but was unable to knock the champ down before the final bell sounded.

This was the fourth bout for Mayweather out of his 30-month, six-fight deal worth $200 million-plus that Mayweather signed with Showtime and its parent network CBS last February.

In the undercards, Leo Santa Cruz (28-0-1, 16 KOs) knocked out Manuel Roman (17-3-3, 6 KOs) in the second round to retain the WBC Super Bantamweight title, while Mickey Bey (21-1-1, 10 KOs) won two of three cards to defeat Miguel Vazquez (34-4, 13 KOs) for the IBF Lightweight title.