The 35-year-old, currently playing a six-Test series in Bunbury, Western Australia, made her international debut in 1999 and has appeared at three Olympic Games.
Richardson-Walsh, who captained her side to victory in the EuroHockey Nations Championship last year, says she is proud of her achievements but has no intention of calling time on her career.
“With my career spanning such a long period of time there have been a lot of highs,” said Richardson-Walsh, who was awarded an MBE in 2015 for her services to hockey.
“To be honest I think the biggest highs have been the European gold in 2015 and then the Olympic bronze medal in London. I think although it’s a bronze medal and not a gold, it was still a massive achievement for that group.
“This is just a huge honour and one that I never, ever thought I could get anywhere near. I can remember getting my first cap in 1999 and knew I was just so thrilled at getting that first cap.
“I never thought I’d ever be the most capped player, it all just seems like a bit of a whirlwind roller coaster ride right now.”
Richardson-Walsh, who plays for Reading in the English National League, will now look to surpass the 355-mark set by current Great Britain assistant coach Karen Brown, a member of the bronze-medal winning team from the Barcelona Olympics in 1992. […]