 On July 12, 2015, he signed with the German team ratiopharm Ulm for the 2014–15 season.On April 16, 2016, Butler recorded a season-high 27 points, shooting 7-of-10 from 3-point range, along with five rebounds, two assists and two steals in an 87–71 win over Giessen 46ers.Butler helped Ulm reach the 2016 BBL Finals, where they eventually lost to Brose Bamberg.