During a team meeting on Tuesday morning, the 32-year-old Phillips informed his Essendon teammates of his decision, confirming he'll hang up the boots at the end of this season.
"I've been privileged to represent three great football clubs over the journey and I'll always have a soft spot for the club. I've loved my past four years here and it's the people here who have made my time in the red and black so enjoyable," Phillips said on Tuesday.
"As I've gotten older, I've realised that the most enjoyment you get out of football is working with your teammates and seeing them flourish. To be able to play alongside and guide my fellow rucks has been crucial to me enjoying my footy and I can't wait to see what they achieve in their careers.
Resilient, team first, the ultimate competitor.
Thanks for everything, Flip.
— Essendon FC (@essendonfc) August 8, 2023
"I want to thank everyone, from my family to teammates, staff to supporters, who supported me throughout the journey. I wouldn't be the player or person without your behind me.
"The time feels right to finish up and head home to Tassie. To my family, Teagan and the kids, thank you. You've been there for most of my career, I couldn't fault your support and I love coming home to you, win or loss."
The three-club veteran has played a significant role for Brad Scott's Bombers this season, particularly in the absence of star first-choice ruckman Sam Draper, who remains sidelined through injury, while also helping mentor young tall Nick Bryan.
Essendon GM of Football Josh Mahoney expressed thanks to Phillips for his vast contribution to the Bombers since his arrival at The Hangar.
"While we are sad to see 'Flip' finish up, his career is the definition of resilience having started as a rookie and playing 12 seasons at three clubs. We congratulate him on his career and thank him for his impact at Essendon," Mahoney said on Tuesday.
"Andrew is a fantastic club person, always putting the team first and doing whatever he can to better his teammates. This was demonstrated through his mentorship of Sam Draper and Nick Bryan, as well as Steph Wales in the AFLW program."
Phillips and the Bombers are scheduled to face North Melbourne this Saturday afternoon at Marvel Stadium.