The Undertaker, who will be 50 years old by this time next year, lost to Lesnar after more than 20 minutes of back-and-forth action inside the WWE ring at Wrestlemania 30 in New Orleans.
Lesnar wasn't given much of a chance by most media outlets and WWE fans heading into Wrestlemania 30, but he proved to be the hungrier competitor come fight night.
After two decades on the WWE circuit, WWE Universe was positive The Undertaker would pull off his 22nd straight Wrestlemania victory by taking out Lesnar.
However, it wasn't meant to be.
The Undertaker showed off a nice striking game in the early minutes of the bout, and he even pulled off one of his signature pile-drivers 15 minutes in.
Unfortunately for him, the younger, faster Lesnar hung in until the very end, and pulled off a shocking upset victory via pinfall at the 26-minute mark.
Fans on hand for Wrestlemania 30 were silent for about 10 minutes following the match, as just about everyone in attendance was in shock. The Undertaker walked off into the sunset to a nice round of applause from the WWE Universe.
WWE officials absolutely threw WWE Universe a curveball by scripting Lesnar to beat The Undertaker this year at Wrestlemania 30.
It seemed certain that The Undertaker had at least two good Wrestlemania years left in him, but now it's uncertain what is in store for him. Most WWE fans were expecting The Undertaker to battle John Cena at next year's Wrestlemania.
Now The Undertaker could either retire or possible battle Lesnar in a rematch next year.
The Undertaker hasn't officially announced his retirement, but it seems the writing is on the wall that he's wrapping up an illustrious pro wrestling career after two decades of competition.