The 34-year-old made his professional debut in the red, amber and black aged just 17 in 2009 – going on to make 79 appearances before joining Hull Kingston Rovers in 2015.
After three years as a Robin, the Cumbrian forward signed for Leeds Rhinos, where he spent the last seven seasons, lifting the Challenge Cup in 2020 and featuring in Super League’s Grand Final in 2022.
The Cumbrian was awarded a three-month testimonial across the 2023 and 2024 seasons, in recognition of his services to Rugby League.
Donaldson completed an emotional return to the Bulls ahead of the 2025 season, featuring 15 times as the club achieved its goal of a return to Super League for 2026.
Sadly, he suffered a season-ending knee injury in June against Doncaster, which ultimately brought his career to a premature end.
Bradford Bulls CEO Jason Hirst said: “James Donaldson embodies all that’s good in Rugby League and what it takes to be a true professional.
“Namely, his moral compass, integrity, focus, dedication, desire, determination, discipline, durability, toughness and sheer will to succeed.
“All attributes that will ensure James continues to be successful in the next chapter of his working life.
“I could go on and on, but needless to say, he has the total respect of everyone at Bradford Bulls, not to mention our wider sport.
“Despite many injury setbacks, James has had a stellar career, across a number of clubs and I’m privileged to have watched him serve our club, so well, across two spells and I am proud to know him.
“On behalf of everyone at Bradford Bulls, I’d like to wish James and his young family every success in 2026 and beyond.”