Playing for Bonifay (Fla.) Holmes County, Walker strung together an impressive season averaging 26 points, 14 rebounds, eight blocks, five assists and three steals per outing.
"The season went good," Walker told Scout.com. "We went 26-5. We made it to the elite eight. We had a pretty good season."
"I did way better than I did as a freshman," Walker added.
What was the difference between his freshman and sophomore seasons?
"It probably was confidence," Walker said. "There were two games where I knocked down free throws for us to win, so I definitely think it was confidence."
Walker, who ranks No. 7 at the power forward spot and No. 21 in the 2013 rankings, describes himself as a versatile forward.
"I'm a 6'8 combo forward that can either post you up or get to the basket," he said. "I'm probably one of the better transition players in the country."
According to Walker, Florida and Florida State are the two schools that have offered to this point.
"I've taken a lot of visits to Florida State," he said. "But I haven't really started taking a lot of visits yet. I'm about to.
"I like how they play and I like all of their coaching staff," he added about the Seminoles.
Although the process just started, Walker said he's already developed a top list of schools.
"The top five that I like is Kentucky, Florida, Florida State, Kansas and Ohio State," he said.
Walker said he would play with the Atlanta Express on the travel team circuit this season.