Reports in League Weekly claim Luke Gale will undergo a medical at Leeds on Monday.
Speculation linking the Cas half-back with a move to the Rhinos has endured for several weeks.
And League Weekly’s Dave Parker claims Gale will cross to Headingley tomorrow for physical assessment.
Parker writes: “The departure of Luke Gale from Castleford Tigers to Leeds Rhinos depends on a medical for the England international scrum-half in Leeds on Monday.
“The deal is done and it’s now up to the medics as Gale comes back from a season out after rupturing his Achilles tendon in pre-season.”
Meanwhile, Leeds half Richie Myler is being linked with a switch to Hull KR, while Danny Richardson could be headed to Cas.