Leeds have rewarded one of their former trialists with a new two-year contract.
He’s gone on to make 24 appearances for the club this season and earned a reputation as one of the squad’s best defenders.
His new terms will keep him at Leeds until at least the end of 2021.
Donaldson said: “I am delighted to have agreed a new deal with the club.
“It has been a tough season but I have thoroughly enjoyed my time at the club and I am looking forward to the next two seasons.”
Director of Rugby Kevin Sinfield added: “It is great news that James has agreed to sign a new deal with the club.
“When he first arrived at the Rhinos, he showed a great attitude and commitment to the club despite initially joining on trial.
“He has become a popular member of our squad and been a key experienced member of the group.
“I am looking forward to seeing him develop after a full off season at the club.”
— Leeds Rhinos (@leedsrhinos) September 12, 2019