All NFL teams must trim their rosters from 75 players to 53 by Sunday morning (AEDT).
Hayne has been widely tipped to make the team as a punt returner by American journalists covering the 49ers.
But Rugby League Week’s The Mole went a step further on Tuesday when he claimed in his column, and on Twitter, that the Hayne Plane has already made the cut.
The story made its way over to San Francisco and coach Jim Tomsula took aim at the report during a radio interview.
“I don’t know what the rules are in the media in Australia, but you might want to fact check … the 53 is not set,” Tomsula quipped.
A fired-up Hayne, who will play his final pre-season game against the San Diego Chargers on Friday (AEDT), went a step further in his criticism of the article on Facebook and Twitter.
Disgraceful journalism. pic.twitter.com/A1m1f3UGnc
— jarryd hayne (@jarrydhayne_1) September 3, 2015