A player for Cwmllynfell RFC near Ystradgynlais has died during a match.
Alex Evans, 31, was playing in a memorial match at Cwmllynfell's home ground, Parc-y-Bryn, against Crynant.
His club said it had "lost a brother on the field and it is hurting so much".
"The whole club and community are shocked and saddened," a statement read on the club's Facebook page.
Speaking to The National, Cwmllynfell RFC's Gareth Evans described Alex as "a cheeky chappy" who "always had this wonderful smile on his face".
"Whether you were at work, playing rugby or having a pint with him, he just had this infectious smile on his face all the time," Gareth said.
Alex had with Cwmllynfell RFC for four seasons, and Gareth described him as a "tenacious" open-side flanker.
"He wore his heart on his sleeve and gave everything for this club," he added. "He loved the club, he loved the village. He will be a great loss to the village and the community."
Cwmllynfell RFC has received messages of solidarity and condolence from amateur and professional rugby clubs, as well as the Welsh Rugby Union.
Gareth has now set up an online fundraising page to support Alex's family during this time.
If you value The National's journalism, help grow our team of reporters by becoming a subscriber.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here