Black was the first man to play 100 games in the Celtic League
Worcester Warriors prop Adam Black will retire from professional rugby after Wednesday's Championship final second leg against Cornish Pirates.
The 35-year-old, who has played 48 games for Warriors since joining in 2009 from Newport Gwent Dragons, is taking up a business opportunity.
"Adam is one of the larger than life characters at the club," says head coach Richard Hill.
"He has made a massive impact both on and off the field."
He added: "His experience and enthusiasm has been a huge asset and he always looks for the positive no matter what.
"That optimism means the dressing is always an upbeat place with the right atmosphere. Adam's maturity and guidance has also helped bring on players like Oliver Tomaszczyk this season.
"In the closing minutes of the semi-final against Bedford, when we had a series of crucial scrums, he turned to Greg Rawlinson and told him this was not going to be their last game. That sums up his desire and passion for the club.
Worcester has some great backers and amazing fans that really deserve success
"We would have loved to have kept him on, but he has made a brave decision to concentrate on life after rugby and new opportunities."
Black said: "I know it's the right time for me to retire.
"It was always going to be a hard decision to make, especially when the club was keen for me to stay, but I've always said one of the main things I wanted to do was retire myself rather than be retired.
"A fantastic opportunity has come up to make something else for myself away from rugby and it only right for me and my family that I take that. I know it's the time to end my playing days.
"Worcester has some great backers and amazing fans that really deserve success. I have played with some of the best boys I have ever met and I truly wish them every success."
Warriors will return to the Premiership in Black's last game unless the Pirates overturn their 21-12 first-leg deficit.