Reardon is awaiting sentence for assaulting his wife
Former Great Britain international Stuart Reardon's Hull FC career has lasted just 11 days after he was released following a failed medical.
Reardon, 27, has not played for nearly a year after rupturing his Achilles tendon in Warrington's Challenge Cup defeat by St Helens last May.
He was released by the Wolves on 9 April and was quickly signed by Hull.
Hull chief executive James Rule said: "We can't retain a player after he has failed a rigorous medical examination."
Reardon had been included in Hull's initial 19-man squad for their Easter Monday game at St Helens, but he leaves without having played a game for the Super League side.
"We obviously feel sorry for Stuart," added Rule. "We wish Stuart well in his future career."
Reardon is due in Bradford's domestic violence court on Thursday - alongside St Helens stand-off Leon Pryce - for sentencing after pleading guilty last month to assaulting his estranged wife Kay.
Reardon began his career with Bradford and won the Harry Sunderland Trophy for his man-of-the-match display in the 2003 Grand Final victory over Wigan.