"I recognize the episode in which Brutus became a victor"
-Katniss quickly mentioning his Games in Catching Fire.
During this year, he was mentored by Magnus Sterlingshre. Also, his odds of winning was 5-1.
During this year, he and the other tributes were forced to eat dead elephants and other savanna animals. Since he was so skilled with a spear in The 75th Hunger Games, it can be assumed that he was also very good at using it this year as well.