Today in sports history: Mayweather moves to 44-0 with win over Guerrero in 2013
Here's a look back at sports happenings on this date in history, May 4:
1935: Omaha wins Kentucky Derby on way to Triple Crown
1935 — Omaha, ridden by Willis Saunders, wins the Kentucky Derby by 1½ lengths over Roman Soldier. Omaha goes on to win the Triple Crown.
Horse named Omaha in an undated photo. Original caption information is missing. Omaha was the triple crown winner in 1935 winning the Kentucky Derby, Preakness Stakes, and Belmont Stakes. (AP Photo)
1994: Suns' Charles Barkley scores 56 in win over Warriors
1994 — Charles Barkley scores 56 points, including a playoff record 38 in the first half, to lead the Phoenix Suns to a 140-133 victory over the Golden State Warriors.
Charles Barkley shown in 1993.
2006: Lakers lose to Suns despite 50 points from Kobe Bryant
2006 — Kobe Bryant scores 50 points for Los Angeles, but the Lakers lose to Phoenix 126-118 in overtime, forcing a Game 7 in the first-round NBA playoff series.
Los Angeles Lakers' Kobe Bryant dunks during the second half of a first-round NBA basketball Western Conference playoff series game against the Phoenix Suns, Thursday, May 4, 2006, in Los Angeles. (AP Photo/Mark J. Terrill)
2008: Stars eliminate Sharks with 4OT win
2008 — In the eighth longest game in NHL history, Dallas eliminates San Jose in Game 6 of the Western Conference semifinals. In a game that lasts 5 hours, 17 minutes, the Stars beat the Sharks 2-1 after Brenden Morrow scores a power play goal 9:03 into the fourth overtime.
Dallas Stars forward Brenden Morrow (10) and teammate Mike Modano (9) celebrate Morrow's game winning goal in the 4th overtime of Game 6 of th Western Conference semifinal playoff hockey series against the Dallas Stars in Dallas, early Monday, May 5, 2008. Dallas won 2-1. (AP Photo/LM Otero)
2009: LeBron James wins first NBA MVP award
2009 — Cleveland’s LeBron James, unstoppable at both ends of the floor this season, is named the NBA’s MVP. James, who easily outdistanced Kobe Bryant of the Los Angeles Lakers in the voting, averaged 28.4 points, 7.6 rebounds and 7.2 assists.
After accepting the NBA Most Valuable Player award during a ceremony at James' alma mater, Akron St. Vincent-St. Mary High School, in Akron, Ohio on Monday, May 4, 2009, Cleveland Cavaliers LeBron James hands the trophy to his son Lebron Jr., 4. Watching are James girlfriend Savannah Brinson and their youngest son Bryce. (AP Photo/Amy Sancetta)
2009: Alex Ovechkin nets first playoff hat trick
2009 — Alex Ovechkin records his first NHL playoff hat trick and nets the winning goal in Washington’s 4-3 win over Pittsburgh in Game 2 of their Eastern Conference series. Sidney Crosby of the Penguins also scores three goals in a losing cause.
In this May 4, 2009, file photo, Washington Capitals' Alex Ovechkin, from Russia, celebrates in front of fans after scoring his third goal of the game against the Pittsburgh Penguins during the third period of Game 2 of an NHL hockey second-round playoff series in Washington. (AP Photo/Nick Wass)
2013: Orb splashes way to Kentucky Derby win
2013 — Orb, carrying Joel Rosario, splashes through the slop to win the Kentucky Derby, coming from way back in the pack and giving Hall of Fame trainer Shug McGaughey his first victory in the 3-year-old classic.
Jockey Joel Rosario, centerm celebrates as Orb crosses the finish line to win the 139th Kentucky Derby horse race at Churchill Downs Saturday, May 4, 2013, in Louisville, Ky. (AP Photo/Darron Cummings)
2013: Floyd Mayweather stays unbeaten at 44-0 with unanimous decision
2013 — Floyd Mayweather comes back from a year’s absence to win a unanimous 12-round decision over Robert Guerrero in their welterweight title fight in Las Vegas. All three judges score the bout 117-111 and Mayweather remains unbeaten in 44 fights.
Floyd Mayweather Jr., left, throws a left jab at Robert Guerrero in the eighth round during a WBC welterweight title fight, Saturday, May 4, 2013, in Las Vegas. (AP Photo/Isaac Brekken)

