Karaban was born to Alexi and Olga Karaban, immigrants from Belarus and Ukraine respectively.[1][2] He has two siblings, younger sister Ana and younger brother Andrew.[3] He grew up in Southborough, Massachusetts, and initially attended Algonquin Regional High School.[4][5] He transferred to the New Hampton School in New Hampton, New Hampshire after his freshman year.[6] Karaban was named the New Hampshire Gatorade Player of the Year as a junior after averaging 25.8 points, 8.7 rebounds, 2.9 assists, and 1.9 blocks per game.[7] After the end of the school year, he transferred a second time to IMG Academy in Bradenton, Florida. Karaban was rated a four-star recruit and committed to playing college basketball for UConn over offers from Stanford, Iowa, and Creighton.[8][9]
College career
Karaban accelerated his graduation at IMG Academy and enrolled at UConn in January 2022.[10] He practiced with the team for the rest of the 2021–2022 season and redshirted the year.[11] Karaban was a unanimous selection to the Big East Conference's All-Freshman team at the end of his redshirt freshman season.[12] He started the 2023 national championship game and scored five points with five rebounds and three blocked shots as the Huskies won 76–59.[13]
Karaban entered his sophomore year on the watchlist for the Karl Malone Award.[14] He scored a career-high 22 points in the Huskies' season-opener against Northern Arizona as UConn won 95–52.[15] Karaban averaged 13.3 points and 5.1 rebounds per game as UConn repeated as national champions.[16] He initially declared for the 2024 NBA draft but ultimately decided to return for his redshirt junior season.[17]
Karaban was one of the people that UConn coach Dan Hurley consulted when he was offered a head coaching job by the Los Angeles Lakers in June 2024.[18]