The 65th Hunger Games took place 9 years prior to the start of the series. These Hunger Games were won by Finnick Odair of District 4 when he was only fourteen years old, making him the youngest tribute to have ever won a Hunger Games.
Finnick reportedly won the Games by having numerous sponsors supporting him due to his good looks and skills that the other tributes didn't have. He was mentored by Mags. Since the main industry of his district is fishing, Finnick could use a trident very well. He received one as a sponsor gift, which Katniss Everdeen claimed in Catching Fire was the most expensive sponsor gift she had ever seen.
Finnick, due to his good looks and great skills as a fighter, was given a trident as a sponsor gift. Supposedly, he was so good with the trident that Katniss Everdeen stated it was "practically an extension to his arm." Finnick was able to create nets out of vines and used them to catch the other tributes so he could spear them with his trident. In a matter of days, he was crowned the victor of the 65th Hunger Games.
Finnick later competed in the 75th Hunger Games and was rescued by the rebels.