3 biggest Brock Lesnar wins on SmackDown and 3 biggest losses
#2 Biggest win: Brock Lesnar & John Cena defeated Kurt Angle & The Undertaker (September 20, 2003)
On the road to No Mercy 2003, two big matches on the PPV merged into a tag team bout on an episode of SmackDown. The hard-fought battle turned into a chaotic mess in the end, as Brock Lesnar prevented a three count after The Deadman hit a Chokeslam on John Cena.
As the referee put his attention to the brawl between Lesnar and Taker, Cena hit Angle with a chain, and picked up the win for his team. This wouldn't be the case at No Mercy though, as Angle managed to return the favor to Cena at the PPV.
#2 Biggest loss: The Big Show, Charlie Haas, & Shelton Benjamin defeated Brock Lesnar, Kurt Angle, and Mr. America (June 24, 2003)
This match took place a short while before Lesnar turned heel and joined hands with Vince McMahon. At this point, Team Angle had broken apart and Kurt Angle had aligned with Lesnar. The two Superstars teamed up with Mr. America, who was Hulk Hogan in a mask, and took on The Big Show and Haas & Benjamin.
As Hogan was about to put Show down, Mr. McMahon came out with an unconscious Zach Gowen. The distraction was enough for Show to hit Hogan with a Chokeslam and pick up the win.