Jon Heyman of Sports Illustrated has a few rumors regarding managers and their job security:

Atlanta Braves: Bobby Cox has said he will step down after this season whether he wants to or not. Fredi Gonzalez, the manager of the Florida Marlins and the third base coach for the Braves from 2003-2006, is a likely choice for Cox’s replacement.

Toronto Blue Jays: Heyman says it time to go for Cito Gaston.

Chicago Cubs: Management worry about Lou Piniella’s health. A likely replacement is Ryne Sandberg, manager at Triple-A Iowa, but he would be a “gamble” in a difficult job.

Los Angeles Dodgers: Joe Torre and owner Frank McCourt could not reach agreement this spring on a new contract for 2011. Most people see McCourt moving on with bench coach Don Mattingly as a likely successor. Some wonder if Mattingly is ready.

Milwaukee Brewers: Ken Macha is in the final year of a two year deal. Some players don’t especially love him.

Pittsburgh Pirates: Manager John Russell’s contract was secretly extended for the 2011 season. With the team in its current poor state, ownership may want to send a message to fans by replacing Russell and eating his contract.

Florida Marlins: Heyman says Fredi Gonzalez may not be appreciated by owner Jeffrey Loria. Gonzalez should be okay especially if he gets the Braves’ job.

Arizona Diamondbacks: GM Josh Byrnes is fighting to keep is handpicked manager, A.J. Hinch. Heyman says that Byrnes’ job may not be totally safe, but firing the bright young Byrnes would be “absolute insanity”.