Diskin was the only player to be charged from the Saints-Rhinos game
Leeds Rhinos hooker Matt Diskin has been found not guilty of making a dangerous tackle during Friday's 28-16 defeat by St Helens.
Diskin appeared before the Rugby Football League's disciplinary committee on Tuesday.
The hooker was accused of using a "chicken-wing" tackle that places undue pressure on the joint of an opponent.
Had he been found guilty, Diskin would have been facing a suspension of up to four matches.
He will now be available for Friday's Super League clash with Catalans Dragons and the Challenge Cup fourth-round tie with Saints on 5 April.
The incident was one of several clashes in one of the most physical contests so far in Super League XIV.
On Monday, Diskin's team-mate Ryan Bailey was cleared of any wrongdoing over his tackle on Saints prop Maurie Fa'asavalu, which left the Samoan with a jaw injury.
The RFL match review panel ruled that Fa'asavalu dipped into the tackle - and although Bailey did make contact with his head, it was with his shoulder and not an elbow or forearm and therefore was not illegal.
St Helens centre Lee Gilmour was also told he will not face further action for the grapple tackle on Leeds centre Lee Smith that prompted an outbreak of fighting, while Leeds pair Carl Ablett and Brent Webb avoided punishment for similar offences.
On the same day, Castleford Tigers full-back Ryan McGoldrick was cautioned for use of his forearm in his side's 19-18 win at Hull FC, while team-mate Mitchell Sargent and Huddersfield Giants hooker Scott Moore were told they will receive warning letters for making dangerous throws.