When asked why he chose the Vols, Richardson said: "I've known Coach Martin for a really long time. I feel comfortable with everything at Tennessee, so I decided."
Another player Martin recruited at Missouri State, point guard Wes Washpun of Cedar Rapids, Iowa, signed with the Vols on Wednesday.
Richardson chose the Big Orange without even getting a chance to check out Thompson-Boling Arena, the Vols' spacious home court.
"It was dark, so I didn't really get to see it," he said. "But they were telling me it holds around 20,000 people or something like that. My high school gym is pretty good size, but it's not anywhere near that big."
Described by Santa Fe High School head coach Shawn Schenk as an exceptional defender, Richardson believes that is the key to earning early playing time at Tennessee.
"As a freshman I see myself being a defensive stopper," he said," and doing whatever I need to do."
In a story posted on this site one day ago, Schenk said Richardson exhibited his versatility by playing all five positions for Santa Fe High. The player proudly confirmed as much.
"Since I got to high school I've played a different position every year," he said. "That's helped me out a lot."
Asked to describe his game, Richardson replied: "I'd say I'm a slasher guy. I like to cut a lot. And people say I defend great. I hear that all that time. I really like playing defense."
The newest Vol said the thing he likes best about basketball is "it's competitive and you make a lot of connections. I've made a lot of friends playing basketball."
He'll be making 20,000 new ones at Thompson-Boling Arena next winter.