The City of Oakland's 11th-hour stadium plan appears to be too little, too late for NFL commissioner Roger Goodell's liking.
Goodell responded to the stadium proposal ahead of this week's annual league meeting in Phoenix, sending a letter to Oakland Mayor Libby Schaaf saying that he believes the city has yet to find "a viable solution" to keeping the Raiders there.
The City of Oakland and its partners earlier submitted a revised financing plan for a $1.3bn (£1.03bn) mixed-use stadium project on the site of the current home of the Raiders, who have called Oakland home for 45 of their 58 seasons, including the past 22.
"The material that we reviewed earlier today confirms that key issues that we have identified as threshold considerations are simply not resolvable in a reasonable time," the commissioner said in the letter obtained by ESPN and other media outlets.
"In that respect, the information sent today does not present a proposal that is clear and specific, actionable in a reasonable time frame and free of major contingencies."
Raiders owner Mark Davis is said to have "great support" to move the franchise from Oakland to Las Vegas after several years of failed contract talks with the city.
A vote could be held during the NFL meetings on Monday or Tuesday, with Davis needing 24 votes of 32 franchise owners to begin finalising relocation to Las Vegas.
One owner, speaking anonymously because he is not authorised to speak for the NFL, told The Associated Press: "Not only have no hurdles been made clear to us, but there isn't any opposition to it."
Added another, also speaking anonymously for the same reasons: "It's going to happen and the sooner we do it, the better it is for the league and for the Raiders."
