Newcastle Falcons No. 8 Ally Hogg will hang up his boots at the end of the season.
Hogg, 35, has made 175 appearances for the Falcons since arriving at Kingston Park from Edinburgh eight years ago. The forward also won 48 caps for Scotland.
News of his retirement comes just one day after veteran Newcastle prop Rob Vickers revealed his career would come to an end this summer.
"It's always a sad time when you have to end one career and look on to the next one, but I've had a good run," Hogg said.
"I'm 35 now which is a decent age for a back-rower, and there have been many highs and lows along the way. Getting to do your hobby for a job is something you can't put a price on, and I've had a fantastic time. I'm pleased with how things have gone but I feel it's time now to try something different."
Both players have work to do before they can think about retirement plans as the Falcons' first win against Leicester at Welford Road in 20 years -- secured by Hogg's controversial late try -- secured them an Aviva Premiership semifinal place.
Dean Richards' side face third-placed Wasps on Saturday, with the victor earning a last-four clash against Saracens while the loser will head to champions Exeter on May 19.
"I've had a number of discussions with Dean Richards and, to be fair, I just think I'm ready for it," Vickers said.
"For me this is the perfect time with the team flying high, with me still playing a genuine part, and it just feels like the moment to step aside and let someone else come through to keep this team moving forward."