Webster-Chan, a 6-foot-7 versatile prospect out of Huntington (W.V.) Prep, made his choice early Friday morning when he verbally committed to Frank Haith and the Missouri Tigers.
Huntington Prep coach Rob Fulford confirmed the news to Scout.com.
"He just developed a relationship with them," Fulford said. "It came down to them and Iowa State. With Missouri they have so many scholarships opening up, it looks like on paper the best place for him to go in and play."
Webster-Chan, a three-star prospect, was originally committed to Louisville, but the two parted ways last year.
Over the summer, Webster-Chan battled injuries to his foot, but Fulford said he's working to get over them and is off to a strong start in the fall.
"He's been playing well," Fulford said. "He's a little bit more comfortable playing the point guard role. He's a skill guy that fills up the stat sheet."
"His main thing from last year until now has been nagging injuries with his foot," he added. "We are hoping he can get over the hump."