The Red Sox and Cubs have long been considered the favorites to sign free agent Jon Lester, with the Braves and Cardinals also lingering. But there may be a surprise coming.

FOX Sports’ Ken Rosenthal reports that there are “at least six” teams expressing serious interest in the left-handed starter and other clubs “continue to jump into the bidding.” The Yankees have denied that they’re going to make a big push in free agency, but Rosenthal writes Sunday that “the entire sport is bracing for them to snap to attention, as they always do.”