The Milwaukee Bucks have fired first-year head coach Adrian Griffin, multiple media outlets reported Tuesday.

ESPN analyst and veteran NBA coach Doc Rivers has emerged as Milwaukee's primary target as Griffin’s replacement, according to multiple reports.

Assistant Joe Prunty is expected to be the team’s interim coach until a permanent hire is made.

The stunning move comes after Monday’s 122-113 win over the Detroit Pistons. The Bucks have won five of their last six and currently sit in second place in the Eastern Conference with a 30-13 record.

Despite the team’s solid record, the Bucks have been criticised for their lacklustre defence this season.

Milwaukee is allowing 120.5 points per game this season after giving up 113.3 per game last season. That decline of 7.2 points per game is the second largest in the league this season.

Despite winning both games, the Bucks surrendered 135 and 113 points in consecutive contests against the lowly Pistons.

Another coaching change is just the latest in a busy stretch for the 2021 NBA champions. The Bucks fired Mike Budenholzer last offseason after a first-round play-off exit. Milwaukee was able to keep Brook Lopez and Khris Middleton in free agency, then swung a blockbuster trade that replaced Jrue Holiday with Damian Lillard.

In October, franchise centrepiece Giannis Antetokounmpo signed a three-year maximum contract extension, pausing speculation about his long-term future in Milwaukee.

The onus now falls on general manager Jon Horst to find a coach who will tighten up the Bucks’ defence and maximise the pairing of Antetokounmpo and Lillard.

Milwaukee’s pool of candidates reportedly centres around accomplished coaches with winning pedigrees, with Rivers topping the list.

Rivers, who joined ESPN last summer after being fired by the Philadelphia 76ers, has 1,097 career wins as a head coach and a .590 record. Rivers coached the 2007-08 Boston Celtics to a championship and reached the Finals again in 2010.