Robert Guerrero is 5-to-1 underdog in Saturday's fight with Floyd Mayweather

Bryan Armen Graham
Thursday May 2nd, 2013

Click to enlarge the most recent odds sheet for Saturday's welterweight title fight between Floyd Mayweather and Robert Guerrero.

LAS VEGAS -- Floyd Mayweather remains a heavy favorite ahead of Saturday's welterweight title fight with Robert Guerrero, though the most recent odds at the MGM Grand sports book have reflected moderate action on the lesser-known challenger.

Guerrero is a +500 underdog, meaning a $100 wager returns $500 in winnings. That number is down from +700 when betting opened on Feb. 27.

Mayweather is a -750 favorite, meaning it requires a wager of $750 to win a profit of $100. That number opened at -1100.

A titleholder at 130, 135, 140, 147 and 154 pounds, Mayweather has never lost in 43 professional fights. The 36-year-old from Grand Rapids, Mich., is an odds-on favorite to win by decision (at 5-to-9) with even odds on a knockout.

Guerrero (31-1-1, 18 KOs), who captured world titles at featherweight, junior lightweight and interim belts at lightweight before skipping the 140-pound division altogether to move to welterweight, is 7-to-1 to win by knockout and 11-to-1 to win by decision.

The fight marks Mayweather's first since he signed a six-fight television deal with Showtime and CBS worth a potential $250 million, parting ways with HBO, which had broadcast his previous 23 fights.

-- Bryan Armen Graham

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.