ST. LOUIS • The St. Louis region is losing population and lags in economic drivers to such a degree that it cannot support three professional sports teams, St. Louis Rams owner Stan Kroenke told the National Football League in his proposal to move to Los Angeles.

Moreover, despite “significant” investments in the team, game attendance “has been well below the League’s average,” Kroenke continued in the league submission, obtained late Tuesday by the Post-Dispatch.

And the local plan to build a $1.1 billion riverfront stadium? “Any NFL Club that signs on to this proposal in St. Louis will be well on the road to financial ruin, and the League will be harmed,” the application said.

In contrast, Kroenke’s proposal to build a $1.9 billion, 3 million-square-foot football palace in Inglewood, Calif., provides the league with “the best economic opportunity in Los Angeles,” it said.

The document is part of a proposal required by league relocation guidelines. The NFL declined to release it publicly. The Rams, however, agreed to do so.

Its 29 pages amount to both a gushing celebration of Kroenke’s Los Angeles stadium plan and a scathing review of the future economic well-being of St. Louis.