In the first year of the Battle of Los Angeles there were sixteen participants, with eight opening round matches, four quarterfinal matches, two semifinal matches, and a final. In 2006 the tournament was expanded to 24 participants, which caused the addition of another eight person bracket and created three semifinals matches and an elimination three-way final match. In 2008 the tournament returned to its 16 man format. In 2011, the tournament was completely revamped, taking place for the first time as a one night tournament with only eight participants.
The 2006 BOLA was held on September 1, September 2 and September 3, 2006 in Reseda, California. The tournament saw the PWG returns of The Briscoe Brothers, after no-showing a number of events, and Super Dragon, who had been injured by the Dynasty earlier in the year.
Alex Koslov was originally scheduled to take part in the tournament, but was replaced by Austin Aries, after going on a six month learning excursion to Mexico. After no-showing Threemendous a month earlier, Jay and Mark Briscoe were taken out of the tournament and replaced by Bryan Danielson and Dragon Kid, respectively. However, Danielson separated his shoulder on August 26 in a Ring of Honor match against Colt Cabana and was therefore taken out of the tournament and replaced by Disco Machine.
The 2006 BOLA saw the introduction of wrestlers from Dragon Gate, which was represented by three regulars (Cima, Genki Horiguchi and Dragon Kid), and finished the tournament with a combined 5-3 record.
Finals: Davey Richards defeated Cima‡ via pinfall in 13:42 to win the 2006 BOLA
* = This was a No Disqualification match † = Kazarian was attacked by the Dynasty allowing Super Dragon to get a bye to the next round ‡ = Super Dragon was attacked backstage by the Dynasty before his final match taking him out of the tournament
Arrogance (Chris Bosh and Scott Lost) defeated the Briscoe Brothers (Jay and Mark Briscoe) and the Strong Style Thugs (B-Boy and Homicide) via pinfall in 15:25 to retain the PWG World Tag Team Championship
Quicksilver, Delirious, M-Dogg 20 and Colt Cabana defeated Kings of Wrestling (Chris Hero and Claudio Castagnoli), Rocky Romero and Necro Butcher via pinfall in 30:09
The 2007 BOLA was held on August 31, September 1 and September 2, 2007 in Burbank, California. The event suffered many losses leading up to it including PWG World Champion Bryan Danielson suffering an eye injury, former World Champion Super Dragon pulling himself from the event and former BOLA winner Chris Bosh announcing his retirement out of nowhere. They were replaced by TNA wrestler Alex Shelley, local worker Tony Kozina and the Necro Butcher. At Giant-Size Annual #4 the month before the event Austin Aries defeated Rocky Romero to take his spot in BOLA.
Ronin and T.J. Perkins defeated Karl Anderson and Bino Gambino via pinfall in 11:59
Chris Hero, Tyler Black, Doug Williams, Susumu Yokosuka, Kevin Steen and Jack Evans defeated Human Tornado, Austin Aries, Jimmy Rave, Davey Richards, Scott Lost and Karl Anderson via pinfall in 22:52
The fourth annual BOLA was held on November 1 and November 2, 2008 in Burbank, California. The tournament was set to follow the 24 man format of the previous two and take place on the weekend of August 30 and 31, but PWG management was unable to book the talent they wished to for the event and decided to move the event and drop the entrants down to 16. On October 16 PWG announced that 17 participants will be in the tournament, this occurred because the two PWG commissioners (Excalibur and Dino Winwood) couldn't come to a conclusion on who would be the final entrant, which lead to one first round match being a three way dance.
The fifth annual BOLA was held on November 20 and November 21, 2009, in Reseda, California. Due to Bryan Danielson winning the PWG World Championship in his farewell match and afterwards vacating it, this year's would also become the new World Champion. The first round of the tournament consisted of eight one-on-one matches between 16 wrestlers. Local newcomers Brandon Gatson and Jerome Robinson earned their spots in the tournament by winning separate four-way matches at PWG's Against the Grain on October 2. Chris Sabin was scheduled to take part in the tournament, but was forced to pull out due to a neck injury. He was replaced by another local newcomer Johnny Goodtime.
The eighth annual BOLA took place on September 1 and 2, 2012, in Reseda, California. Initially, on July 22, the tournament was announced as taking place in one night with twelve participants, however, the following day it was expanded to two nights with four more wrestlers added, when another event scheduled for the Reseda venue was cancelled.
The tenth annual BOLA took place on August 29, 30 and 31, in Reseda, California. Taking place over three nights for the first time in seven years, the tournament featured 24 participants. AR Fox and Trent? were originally announced for the tournament, but on August 6 PWG announced that they would have to pull out due to injuries. They were replaced by Bobby Fish and Candice LeRae, respectively. On the first day of the tournament, it was announced T.J. Perkins would be replacing an injured Brian Cage.
Finals: Ricochet defeated Johnny Gargano and Roderick Strong via pinfall to win the 2014 BOLA
Friends of Low Moral Fiber (Chuck Taylor, Kenny Omega and Zack Sabre, Jr.) defeated Mount Rushmore (Adam Cole, Matt Jackson and Nick Jackson) via pinfall.
World's Cutest Tag Team (Candice LeRae and Joey Ryan) defeated Inner City Machine Guns (Rich Swann and Ricochet) and Christopher Daniels and Frankie Kazarian via pinfall to retain the PWG World Tag Team Championship.
The Young Bucks (Matt Jackson and Nick Jackson) defeated Christopher Daniels and Frankie Kazarian via pinfall.
reDRagon (Bobby Fish and Kyle O'Reilly) defeated Biff Busick and Drew Gulak via pinfall.
Mount Rushmore (Adam Cole, Matt Jackson and Nick Jackson) defeated ACH, Brian Myers and Chris Sabin via pinfall.
Chris Hero, Chuck Taylor, Joey Ryan, Rich Swann and Willie Mack defeated Biff Busick, Bobby Fish, Cedric Alexander, Drew Gulak and Tommaso Ciampa via pinfall.