Michael Phelps sets world record in the 100 metres butterfly swimming event at the World Championships in Rome, Italy.

American Aaron Peirsol set the 200 metre backstroke record at the World Championships in Rome, Italy.

Cesar Cielo set a record time of 46.91 for the 100 metres freestyle swimming race at the World Championships in Rome, Italy.

Michael Phelps sets world record in the 200 metres butterfly swimming event at the World Championships in Rome, Italy.

Chinese swimmer Zhang Lin set a record time in the 800 metres freestyle swimming race at the World Championships in Rome, Italy.

Paul Biedermann set a record time of 01:42.0 for the 200 metres freestyle swimming race at the World Championships in Rome, Italy.

Paul Biedermann set a record time in the 400 metres freestyle swimming race at the World Championships in Rome, Italy.

Mark Buehrle of the Chicago White Sox pitched a perfect game against the Tampa Bay Rays, making him just the 18th pitcher in MLB history to retire all 27 batters without a hit or error.

The NHL plays their first regular-season games in Stockholm, Sweden, and Prague, Czech Republic, both the Penguins and the Rangers win their games.

The final home game was played at the stadium nicknamed, "The House That Ruth Built", Yankee Stadium in the Bronx it hosted 6,581 Yankees regular season home games.