The Genesis Invitational is a professional golf tournament on the PGA Tour in Southern California, first played 99 years ago in 1926 as the Los Angeles Open.

[10] In early January 1962, 21-year-old Jack Nicklaus made his professional debut at the Los Angeles Open – his 289 tied for 50th (last place after the cut) and earned $33.33 in prize money.

In 1992, the Nissan Los Angeles Open at Riviera CC was the site of Tiger Woods' first PGA Tour event as an amateur player, as a 16-year-old high school sophomore.

[18] The 2001 event was only the second time that a six-player playoff was needed in PGA Tour history to determine the tournament winner.

Robert Allenby won the playoff ahead of Toshi Izawa, Brandel Chamblee, Bob Tway, Jeff Sluman, and Dennis Paulson.

[21] In 2007, Rich Beem made a hole-in-one at the 14th hole on Saturday to win a new red Altima coupe, which he immediately ascended, embraced, and sat atop of in triumph.

The five-year agreement, which extended through the 2012 event, was announced October 15, 2007, by PGA Tour Commissioner Tim Finchem and William A. Osborn, Chairman and CEO of Northern Trust Corporation.

Phil Mickelson won the 2008 tournament and successfully defended the title in 2009 with a one-stroke victory over Steve Stricker.

In 2010, Stricker came back to win the Northern Trust Open and secure his ranking of the number two player in the world.

In 2016, Bubba Watson won the tournament for a second time in three years, holding off Adam Scott and Jason Kokrak to win by one shot with a 15-under-par total.

[28] Following the demise of The National tournament after 2018, which was run by the Tiger Woods Foundation, the Genesis Open was converted to an invitational for 2020, with a larger purse and a smaller field.