Porter, a 6-foot-10 center, committed to Washington before his sophomore season. He is the No. 26 player in the 2018 class.
"Really just because of the coaching changes," Porter told ESPN. "I committed so early because I fell in love with the coaches, and now that they're gone, so am I."
Porter is the younger brother of No. 1 senior Michael Porter Jr. Romar hired their father, Michael Porter Sr., as an assistant coach at Washington last spring. Porter Jr. committed in the summer.
Romar was fired Wednesday after 15 seasons with the Huskies. With Porter Sr. now a free agent, signs point to new Missouri head coach Cuonzo Martin pursuing him as an assistant coach. The Porter family is from Missouri and has plenty of ties to the school. Porter Sr. was an assistant women's coach with the Tigers for three seasons before going to Washington, two of Porter Jr.'s sisters play at Missouri, and Porter Jr.'s aunt is the head women's basketball coach.
"We're just trying to evaluate all our options right now," Porter told ESPN.
Washington has the No. 3 recruiting class in 2017, with Porter Jr. leading a group that also includes ESPN 100 prospects Daejon Davis (No. 44), Jaylen Nowell (No. 54) and Blake Harris (No. 99), as well as three-star forward Mamoudou Diarra.