The Hull striker will be out of action for upto three months after suffering a broken leg after Guthrie’s challenge.
An FA spokesman said: “Every sending off carries an automatic sanction under the current regulations.
“The FA doesn’t have the power to extend automatic suspensions.
“The only circumstances in which we could take any further action would be to issue an additional charge against a player.
“This occurs only in exceptional cases, such as Ben Thatcher’s challenge on Pedro Mendes in 2006.”
