9:59 pm: MacPhail made his decision last month and told several fellow general managers in September that he wouldn't return in 2012, reports Bob Nightengale of USA Today (Twitter link).
7:49 pm: Andy MacPhail will leave his position as the Orioles' president of baseball operations because of family obligations, reports Dan Connolly of the Baltimore Sun (Twitter link). MacPhail's current contract expires on October 31, when he will officially part ways with the team, reports MLB.com's Brittany Ghiroli.
MacPhail has been widely predicted to leave the O's this offseason, though there had been speculation in recent days that he could remain with the team. With manager Buck Showalter staying in the dugout, the Orioles now join the Angels and Cubs (and theoretically the Yankees, Red Sox and Astros) as teams looking to hire a new general manager this winter. It will be hard to tell how much freedom a general manager will have in Baltimore, given the rumors that Showalter could be the de facto GM and owner Peter Angelos' reputation for involving himself in the team business.
Ken Rosenthal of FOX Sports reports the situation with Showalter is "still fluid" and the manager could still be convinced to take on the GM's job. Rosenthal also names Blue Jays assistant GM Tony LaCava and Marlins assistant GM Dan Jennings as two executives under consideraton to be Baltimore's next general manager.
MacPhail, 58, has served as Baltimore's president of baseball operations since June 20, 2007. The Orioles had a 307-433 record under MacPhail's watch, never winning more than 69 games in his 4.5 years with the team. Prior to coming to the Orioles, MacPhail won two World Series titles as the Twins' general manager from 1985 to 1994, and was the Cubs' team president from 1995 to 2005. His name has been mentioned as a possible successor to Bud Selig as Major League Baseball's commissioner.