The 57th Games were won by the 18 year old Blight Jordan. These Games weren't popular at all unfortunately, since nothing exiting happened during this time.
Since Johanna mentioned on how the tributes of District 7 wore costumes resembling trees for 40 years during Catching Fire, it can be safely assumed that he wore this outfit too. He was mentored by Eero Nitya. Also his odds of winning were 5 - 1.
During the Bloodbath, Blight threw an axe at the boy from District 3, killing him instantly. He later ran away with many supplies, lasting for some time since he knew how to manage to make the food last for a long period of time. After this, he killed the last 2 careers with a sword and won the Games.