List of WWE pay-per-view and WWE Network events
2011

Date
Event
Venue
Location
Main event
January 30
Royal Rumble
TD Garden
Boston, Massachusetts
40-man Royal Rumble match
February 20
Elimination Chamber
Oracle Arena
Oakland, California
CM Punk vs. John Cena vs. John Morrison vs. Sheamus vs. Randy Orton vs. R-Truth
April 3
WrestleMania XXVII
Georgia Dome
Atlanta, Georgia
The Miz vs. John Cena for the WWE Championship
May 1
Extreme Rules
St. Pete Times Forum
Tampa, Florida
The Miz vs. John Cena vs. John Morrison for the WWE Championship
May 22
Over the Limit
KeyArena
Seattle, Washington
John Cena vs. The Miz for the WWE Championship
June 19
Capitol Punishment
Verizon Center
Washington, D.C.
John Cena vs. R-Truth for the WWE Championship
July 17
Money in the Bank
Allstate Arena
Rosemont, Illinois
John Cena vs. CM Punk for the WWE Championship
August 14
SummerSlam
Staples Center
Los Angeles, California
CM Punk vs. Alberto Del Rio for the WWE Championship
September 18
Night of Champions
First Niagara Center
Buffalo, New York
Triple H vs. CM Punk
October 2
Hell in a Cell
New Orleans Arena
New Orleans, Louisiana
John Cena vs. Alberto Del Rio vs. CM Punk for the WWE Championship
October 23
Vengeance
AT&T Center
San Antonio, Texas
Alberto Del Rio vs. John Cena for the WWE Championship
November 20
Survivor Series
Madison Square Garden
New York, New York
John Cena and The Rock vs. Awesome Truth (The Miz and R-Truth)
December 18
TLC: Tables, Ladders & Chairs
1st Mariner Arena
Baltimore, Maryland
CM Punk vs. The Miz vs. Alberto Del Rio for the WWE Championship

Question: What wrestling pay-per-view (PPV) event took place at Staples Center in 2011 and when did it happen?
Answer: SummerSlam was a wrestling pay-per-view (PPV) event by WWE that took place on August 14, 2011 at Staples Center.