Ward faces biting charge
Their appearances follow the weekend's Premiership match between Harlequins and Saracens.
Rhys Gill of Saracens has been charged with dangerous tackling - contrary to Law 10.4(J).
Gill was sent off during the second half of the match after tip-tackling George Lowe.
Dave Ward is charged with acts contrary to good sportsmanship - contrary to Law 10.4(m).
The Quins hooker was cited for allegedly biting Jackson Wray of Saracens in the second half.
James Horwill has also been charged for punching or striking - contrary to Law 10.4(a).
He is alleged to have struck Saracens lock George Kruis in the first half of the match.
The hearings will be heard by a panel chaired by Julian Morris.