10:30pm: The Yankees are reluctant to pursue Greinke if Cliff Lee signs elsewhere, according to Heyman (on Twitter). Jack Curry of the YES Network reports that the Yankees won't make Greinke their Plan B, though they have discussed him (Twitter link). Heyman suggests the Yankees will spend aggressively on relievers if they don't sign Lee.
12:09pm: Royals GM Dayton Moore is "actively gauging" the trade market for Zack Greinke, reports ESPN's Jerry Crasnick. Moore "has focused on adding up-the-middle position players who are close to major league ready," and the Yankees, Rangers, and Brewers are not considered among the best matches.
The Blue Jays and Nationals have been actively pursuing Greinke, and the Jays theoretically do have the players to pull off a deal if the righty's no-trade clause can be addressed. However, ESPN's Buster Olney tweeted on Saturday that the Blue Jays "have no intention of giving up Kyle Drabek and Travis Snider" for Greinke.
Brett Gardner's name has come up in talks between the Royals and Yankees, according to Crasnick.
SI's Jon Heyman covers Greinke today as well, adding that the Dodgers have been linked to him and the Angels could make sense. Heyman feels that the Yankees do have the players "to form a respectable deal."