First, Felix Hernandez. Then Justin Verlander. And soon, Clayton Kershaw. The Dodgers have made progress on a seven-year extension for Kershaw, and the dollar amount will be above the $180 million the Tigers awarded Verlander, according to major-league sources. Kershaw, 25, would warrant a richer deal than Verlander, 30, and Hernandez, 27, because he is younger than both of those pitchers, sources said. The two sides discussed a variety of proposals earlier in the negotiations — including 10 years, $250 million and 12 years, $300 million, sources said.