St George Illawarra forward Tyrell Fuimaono was unsuccessful in his quest for a downgrade at the NRL judiciary on Tuesday night.
Fuimaono was charged with a grade two dangerous contact offence following the Dragons' Round 14 win over Parramatta last weekend.
NRL counsel Peter McGrath successfully argued that the force of Fuimaono's third-man-in hip drop tackle on Junior Paulo midway through the first half of last Friday's game warranted a grade-two charge.
McGrath noted that the Dragons back-rower's actions led to him landing on the "vulnerable" Paulo's lower limb and therefore caused an unacceptable risk of injury.
Fuimaono's representative Nick Ghabar argued that while the 24-year-old accepted there was a risk of injury - hence why he pleaded guilty - the offence was not worthy of a grade two charge.
"You shouldn't confuse force with momentum", Ghabar said, while arguing that Paulo driving forward created the illusion of a greater impact.
The Indigenous All Stars representative will miss the Dragons' next two games against the Brisbane Broncos and Gold Coast Titans.
Earlier, Titans back-rower Kevin Proctor (biting) and Storm front-rower Jesse Bromwich (dangerous contact) were each suspended for four and one week(s) respectively.