The 22-year old arrives at the Knights after playing for Northern Hawks, a feeder club for Newcastle Knights.
He’s also had time at Tweed Seagulls, featuring for their under 20s.
Knights head coach, Mark Applegarth said: “I’m really happy we’ve got Harry.
“We had him in line for next year but with a couple of injuries, we thought it was wise to give us a little bit more depth and cover by bringing him in now.
“He’s definitely a player I think will catch the fans’ eyes when he gets his chance.
“He fits our mould of being young and hungry and wanting to prove himself.”
Fraser is available for Sunday’s trip to Hunslet RLFC in the Betfred Championship.
Time can’t bowl him out as Bishopthorpe cricketer is still playing at 80 years old
York Knights Land Major Signing with Super League Star Paul Vaughan for 2026
Dan Pybus signs a two and a half-year contract with York City FC, committing his future to the club.
