Peacock, 36, made his debut for Bradford on April 11 1999 against Wakefield, having previously played four games on loan at Featherstone, and now 15 years on, he will play his 500th game against the same opponent.
To mark the occasion, thousands of Peacock masks will be distributed at the game for supporters to wear. Plus the club will be using a special hashtag #JP500 for fans to pay tribute to the legendary forward on social media that will be shown on the big screen and scoreboard on the night.
Rhinos Media & PR Manager Phil Daly said: “JP has announced that next season will be his last in the game so this is a chance for us to mark an incredible landmark in his long career and pay tribute to him when he is at the top of his game.
“He is the most iconic and successful player of the Super League era so for him to reach this milestone exactly 15 years after his first Super League appearance and against the same opposition has a nice symmetry to it.
“We will be paying tribute to JP in our matchday magazine, Blue & Amber, and also in our ipad matchpack, Leeds Rhinos Live, as well as on the big screen on the match night.”
In an illustrious career to date, Peacock has won eight Super League titles, two Challenge Cups, four World Club Challenges, won the Man of Steel (in 2003) and was awarded the MBE in 2012.