The total is low here, but it's totally justified. Missouri ranks seventh in the KenPom adjusted defensive efficiency ratings, while Butler is rated 29th in defensive efficiency.
Both teams play at a very slow pace especially Butler. Only five teams force more turnovers than Missouri. So the the Bulldogs will be especially careful about pushing pace.
The Under has cashed in 13 of Butler's last 16 nonconference matchups. Note this game is being played in Kansas City so neither team is familiar with this neutral court setting, which is another plus for the Under.