The St. Louis Cardinals and Los Angeles Dodgers are the two clubs most aggressively pursuing Jon Lester and David Price, according to sources.

The Cardinals and Dodgers are determined to land a top-level starter prior to Thursday's non-waiver trade deadline and have remained in contact with the Boston Red Sox and Tampa Bay Rays on the two left-handers.

As of early Wednesday afternoon, Lester seems more likely to be traded than Price.

The Milwaukee Brewers and Pittsburgh Pirates could still be involved in Lester.