With WWE Superstars Seth Rollins & Dean Ambrose currently being in a heated argument in front of the WWE Universe, WWE.com decided to take a look at the 25 most personal grudges in history, and no one can forget the Rey Mysterio VS. Eddie Guerrero feud of 2005. Breaking the top 10, WWE posted:
#10 Eddie Guerrero vs. Rey Mysterio
In 2005, longtime friends Eddie Guerrero and Rey Mysterio paired up to become a successful duo, winning the WWE Tag Team Championships. However, after Guerrero left Mysterio high and dry during a title-losing effort against MNM, Latino Heat’s darker feelings toward The Ultimate Underdog showed through. Soon thereafter, Guerrero began taunting his former pal with the threat of revealing an embarrassing secret, which turned out to be that Guerrero was the biological father of Rey’s son Dominick. (Years earlier, Mysterio and his wife, Angie, had trouble conceiving, and in an agreement with Guerrero, they adopted Dominik as a baby.)
Before long, Guerrero hung over Mysterio’s head a new promise: to take back custody of Dominik. With the threat of losing his son staring him in his masked faced, Mysterio took to battle Guerrero at SummerSlam 2005 in a Ladder Match in which the winner would be named Dominik’s legal guardian. The Master of the 619 prevailed, thanks to interference by Vickie Guerrero, and the Mysterio household was restored.