Allie Green IV announced Wednesday that he is joining former teammate Akayleb Evans in committing to the Tigers.
The lineman played two years at Missouri under Gary Pinkel.
Scott is the third player and second corner to commit to Missouri since Thursday.
Missouri's games against Central Michigan, Kentucky and Southeast Missouri State now have start times.
Wide receiver Jalen Knox, cornerback Chris Mills and offensive lineman Mike Ruth have all left Missouri football.
The announcement leaves the Tigers thin at defensive back heading into the season.