UPDATE: Phillies general manager Ruben Amaro told MLB Network that there is "very little chance" Cliff Lee gets moved. Whether that's truth or trade-deadline posturing is difficult to say. Though it may be unlikely that Lee is dealt, Amaro didn't say a trade was impossible.
With Clay Buchholz injured, the Red Sox could use some aid in the starting rotation, and it is possible they will try to make a big splash at the deadline.
The Red Sox are considered "the biggest player" in a potential trade for Phillies pitcher Cliff Lee, according to CBS Sports' Jon Heyman.
The Phillies would want a large haul of prospects for Lee, but the Red Sox may be unlikely to deal some of their top prospects like Xander Bogaerts and Jackie Bradley Jr.
However, Boston has a solid group of highly-touted, young pitchers in their farm system.
"Boston has been adamant about not including top prospects Xander Bogaerts and Jackie Bradley Jr. in deals," Heyman wrote. "But they have about 10 more top-line prospects, including pitchers Matt Barnes, Brandon Workman, Henry Owens, Allen Webster and Rubby De La Rosa and many others."
Lee has a 10-4 record with a 3.05 ERA this season, but has a no-trade clause to 21 teams, according to CBS Sports.
It was only a year ago the Red Sox dumped the massive contracts of Adrian Gonzalez, Josh Beckett and Carl Crawford to the Los Angeles Dodgers, so the Red Sox do have room on their payroll to add Lee. It would come at a hefty price, though, as the left-hander is owed $25 million in the 2014 and 2015 seasons with a vesting option for 2016.