With a deadline looming, MLB on Sunday submitted what was billed as a final offer regarding an international draft, sources told ESPN.

The league increased the amount of money that would be guaranteed to the top 600 international players by $10 million, going from $181 million to $191 million, sources said. But the two sides remain very far apart, and the prospect of a deal seems unlikely.

It is unclear whether the MLB Players Association would submit another counter Monday, or whether the union would take MLB's latest offer seriously enough to submit it to a vote among its player leadership.