10 Marvel Heroes You Won't Believe Defeated Hulk
2. Havok
Of all the X-Men fans would expect to fight the Hulk, Havok, aka Alex Summers, probably isn't very high on the list - let alone of those you'd expect to be actually capable of defeating him either.
However, it just so happens to be the case that the other Summers brother (the original being Scott Summers, the X-Men's Cyclops), fought with the Hulk and not only survived, but emerged victorious too. This came about in The Incredible Hulk #150, after Banner's other half had taken Lorna Dane hostage.
As Havok confronts Hulk, Jade Jaws picks up a giant piece of rock to hurl at his would-be pursuer. Alex then concentrates all his power at the Hulk's head, causing him immense pain and forcing the one-time Avenger to let go of his makeshift weapon, and collapse in agony.