Hall of Famer Patrick Ewing reportedly will be considered to coach Georgetown.
"It is with profound regret and deep appreciation that I informed John Thompson III this morning that the University will no longer be retaining his services", Georgetown president John J. DeGioia said in a statement.
Amaker, meanwhile, has led three different college basketball programs as a head coach - Seton Hall, Michigan and, since 2007, Harvard.
Their attendance has slipped in recent years, they couldn't announce their own head coach at home games at the Verizon Center in 2016-17 and after losing to Arkansas State in an on-campus home game, the student body chanted "Fire JT3".
As Adrian Wojnarowski of The Vertical pointed out on Thursday, Ewing has remained committed to being an National Basketball Association coach. Woj says Ewing was close to getting the Sacramento Kings job too, meaning he may not feel like it's worth leaving the National Basketball Association for college if he's so close to his dream of finally becoming an National Basketball Association head coach. It's unclear if any candidates have emerged as front-runners for the position, which has been held either by a member of the Thompson family or Thompson Jr.'s staff since 1972.
When he was hired in 2004, the younger Thompson was tasked with restoring the program to the level it had reached under his father, who guided the Hoyas to at least a share of seven Big East titles and three Final Four appearances, including the 1984 national championship. Adrian Wojnarowski of Yahoo Sports reported that the Hoyas are considering Ewing as a potential head coach.
Recruiting would obviously be a major question mark but Ewing has the playing and coaching pedigree to be a wild card in this.
Thompson's record was 278-151 at Georgetown, with eight trips to the NCAA Tournament.
The Rams have seen improvement in each of Hurley's five seasons as head coach, and were ranked in the top 25 nationally at the start of the season. He's made Rhode Island one of the premier programs in the Atlantic 10. Following that Final Four appearance, Georgetown never again played past the first weekend of the NCAA tournament under his leadership.
Nevertheless, Ewing's peerless history and relationship with Georgetown could amend his past indifference to engaging in a college opening. But after a 14-18 season and ninth-place finish in the Big East, the underachievement took its toll for the 13-year head coach.