Live color from MGM Grand as Floyd Mayweather takes on Shane Mosley

By John Katsilometes

Saturday, May 1, 2010 | 6:13 p.m.

Updated at 9:28: Merchant asks about Pacquiao, about blood tests (And really, is this going to be the sticking point, as it were?). "All I want is an even playing field," Mayweather says, mixing metaphors but making a good point. "If he does a blood and urine test, Olympic-style testing, I'll fight him. If he doesn't, we have no fight."

Updated at 9:26:I was right on it, and I'm sure almost everyone scoring it was, too: Mayweather unanimously, 119-109 on two cards, 118-110 on a third. More blasts. Merchant interviewing Mayweather now, but man is it hard to hear, maybe because those blasts -- louder than the cannon shots from the AC/DC show last month -- have muted my ears. "Coulda got a knockout, but he's a tough customer," he says, referring I'm fairly certain to Mosley.

Updated at 9:24: It's over. They hug (during a fight, this is called a "clinch.") My rudimentary scoring system, equal parts inspired by Chuck Giampa minute-by-minute method and audience response, has Mayweather winning it 119-109. I'll give Mosley Round 2, clearly. He might have taken the first round, too. Now let's get Mayweather-Pacquiao done, after a lengthy debate about the testing of human fluids, of course.

Updated at 9:20 p.m.Last round. Mosley needs a knockout. Speaking of knockout, still no Bridges. Some fans are actually filing out of the arena. No need to see Mayweather backpedaling for three more minutes, I guess.

Updated at 9:13 p.m: Be glad you don't have a job where your nose is swabbed. Mayweather, in Round 10 now, still accurate and sharp. Mosley looks like he's had a lot of life punched out of him. I look around the arena and even in a relatively small venue, fans are watching the fight from the monitors.

Updated at 9:07 p.m.The chants "Money" and "Mosley" sound a lot alike, but it seems the crowd is starting to pull for Mayweathere, who punches and talks trash with great dexterity. He slammed Mosley with a right and seemed almost to put him down midround. Entering No. 9 now.

Updated at 9:04 p.m.: Mayweather seemed to have Mosley hurt in Round 7. I don't know much about the technical side of this sport, but Mayweather seems to lunge a lot, and if he lunges at Pacquiao as he's going mug-first at Mosley, he'll have his face ripped off. Oh, and I'm to give a shout-out to ring girl Delecia Dean of "Fantasy" at Luxor.

Updated at 8:55: Mosley seems wearing down in Round 5; Mayweather is still firing away. It also seems the smoke has finally cleared the arena.

Updated at 8:53: Mayweather jabbing well, cracking a couple of good rights. Off the topic, haven't seen Bridges yet. Where is she? Not seen Diamond, either.

Updated at 8:48:To quote the crowd between rounds: "Murmurr." Mayweather has righted himself and probably won the third round. Really competitive fight.

Updated at 8:43 p.m.: Mayweather just got the snot pounded out of him in Round 2. His lack of punching power is sort of obvious when he's trying to fend off Mosely. Wonder what Manny Pacquiao thinks of what's unfolding here.

Updated at 8:40 p.m.Smoke from Mayweather's fireworks show is still hanging over the ring in a ragtag Round 1. Mosely slipped. Nobody harmed, at least physically after one round.

Updated at 8:30 p.m.: Well, Brown sang a nice version of the anthem. It's one-anthem night. Entrances now, with Mosely in first, to to Eminem's "'Til I Collapse"and Rihanna-Jay-Z's "Run This Town" (Rihanna follows Brown!). Mayweather's entering to a veritable Vegas production show (and not a good one) and a series of explosions. It's a three-man Motown-style act, but I don't recognize these guys. All these explosions are doing little but irritate the crowd. One veteran fight scribe just said, "That's the worst entrance I've ever seen." Hard to argue.

Updated at 8:19 p.m.: Leonardo DiCaprio and Bar Refaeli are here. Both are wearing hats. He's sporting a Michigan Wolverines cap.

Updated at 8:15 p.m.: Chris Brown, on his Image Reclamation World Tour, will be singing the national anthem, giving himself the best chance of being cheered before a large crowd.

Updated at 8:10 p.m. Will Smith, who played Ali in "Ali," just kissed Ali on the cheek. Ali responded with a bemused smile.

Updated at 8:06: More famous-ness: Sugar Ray Leonard and Dolphins receiver Brandon Marshall. Jay-Z, too, just announced. Ali finally announced. Huge roar, standing ovation. Frank Thomas recently retired, is here, as is LaDainian Tomlinson of the hodgepodge N.Y. Jets. Tomlinson is only 30 in a sport that ages you really fast, especially if you are a running back.

Updated at 7:58: More star search, Schwarzenegger's announcement drew some boos, but Mike Tyson cheered lustily. A list as I heard it from rumble-seater Michael Buffer: Ricky Hatton, Roberto Duran, Tommy Hearns, Michael J. Fox, Rosie Perez, L.L. Cool J, Mary J. Blige, Jeremy Piven, Mark Wahlberg, Maria Carey, Jamie Foxx, Usher, Eva Longoria, Will Smith, Neil Diamond. Kevin Dillon Jerry Ferrera and Nelly. Also, some dude who looks like Guy Fieri but is not, in fact, Guy Fieri.

Something I just noticed, too, I'd not detected before at the MGM Grand Garden is, the sound system is not great. Buffer's voice is pretty muffled. Something to call attention to in the next state-of-the-building meeting.

Updated at 7:35 p.m. Arnold Schwarzenegger and Maria Shriver just walked in. Angelica Bridges expected soon.

Updated 7:28 p.m.: Muhammad Ali, with manager Bernie Yuman, just walked in. Big screen showed his image, but not much of a response. Not sure many people in attendance realized it was him. Crowd still arriving, too. I was wrong about the sellout -- it will be about 700 short of that, unless the 700 Club snaps up all those tickets as walk-up.

Updated at 7:08 p.m.: Oscar De La Hoya just strutted in. He's one of the few ex-fighters, the very few, who does not look like an ex-fighter. He looks like he probably smells good, too.

Updated at 7:05 p.m.: Daniel Ponce De Leon, which is the greatest name in all of sports, has just won a decision over Cornelius Lock, which is the second greatest name in all of sports, by decision for the WBC Latino featherweight title. And who says boxing has too many titles and sanctioning bodies?

Mark Gray of People mag and People.com just sat next to me. Thus, it will be a lot easier for me to track celebs, especially if Mark is not drunk while on assignment. I kid of course.

Updated at 6:36: Nothing says "party" to me like Larry Merchant in a tux.

Updated at 6:26: All right. Take 1. The last time I attempted a live blog of this sort was March 13 for Manny Pacquiao-Joshua Clottey at Cowboys Stadium in Arlington, Texas, where the wireless service was running off the same frequency, Kenneth, as the HBO PPV feed. Something like that. But this is a venue where a $12 trillion big screen has been installed and those writing about the event being splayed on that screen cannot reach their audiences because the WiFi is all knotted up.

This is not a round-by-round account of the main event or any other fight. What I'm doing is raking the scene for groovy episodes or individuals. I will say that Said Oaili of VegasVille just got off the mat to knock out Hector Saldivia of Chubut, Argentina, in the first round of a scheduled 10-round welterweight bout.

The MGM Grand Garden Arena is filling. We expect a sellout. I'm reminded of my most recent visit to the venue, for AC/DC. Someone dial up "Thunderstruck" on the house jukebox, eh?

Follow John Katsilometes on Twitter at twitter.com/JohnnyKats.