“The Phillies have reached agreement with the Indians on a trade that would bring them left-hander Cliff Lee and outfielder Ben Francisco for Class A right-hander Jason Knapp, Class AAA right-hander Carlos Carrasco, shortstop Jason Donald and catcher Lou Marson, according to major-league sources.

The deal is pending a review of medical records.

Carrasco was scratched from his start for the Class AAA Lehigh IronPigs on Wednesday, and Donald and Marson were not in the lineup. It was not known whether Donald and Marson had scheduled off-days for an 11 a.m. start after a night game.

Talks remain fluid — the Phillies also are talking to the Mariners about left-hander Jarrod Washburn, and the Dodgers planned to make a “hard push” for Lee on Wednesday, according to a source.

But if the deal described by the source is accurate, the Lee trade would be a coup for both the Phillies and Indians.

The Phillies would be getting the reigning American League Cy Young Award winner for the rest of 2009 and ’10 without giving up any of the three players the Blue Jays initially wanted for Roy Halladay — left-hander J.A. Happ, right-hander Kyle Drabek and outfielder Dominic Brown.

The Indians, meanwhile, would be getting four of the Phillies’ top 10 prospects according to Baseball America’s preseason rankings. Carrasco was rated second, Marson third, Donald fourth and Knapp 10th.

Knapp, who does not turn 19 until Aug. 31, is currently sidelined with shoulder stiffness, but one scout says his upside is greater than Drabek’s, calling the 6-foot-5, 215-pound righty a “Halladay clone.”

It is possible that the Indians could send the Phillies money in the trade to cover part of Lee’s remaining salary — slightly less than $2 million this season, plus a $9 million club option for 2010.”