3:27pm: ESPN's Buster Olney tweets that he heard from multiple sources that Rosen's report of a preliminary 10-year agreement is not accurate.
3:05pm: WCCO TV's Mark Rosen reports that Mauer and the Twins reached a preliminary agreement on a 10-year extension. Such a contract would take him through the 2020 season, at which point he'd be 37.
10:32am: Joe Mauer may soon sign a contract extension with the Twins, believes Joe Christensen of the Minneapolis Star-Tribune. Two Christensen sources take the good vibes even further, suggesting the number of years and guaranteed money is already agreed upon. Christensen's take on a Mauer extension: "It's a matter of when, not if."