According to Thom Loverro of the Washington Times, Mark Teixeira will be making his decision on where he’ll play today. Buster Olney and Peter Gammons of ESPN.com also confirm this as well.

A major league baseball source has told The Washington Times’ Thom Loverro that there will be an announcement today regarding the future of free agent first baseman Mark Teixeira.

While the source declined to discuss specifics, there are strong indications that the Red Sox will announce that they have landed the highly-coveted slugger, who has been courted this off-season by several major league clubs, including the Angels, Orioles and Nationals.

More on this as it develops this afternoon.

Update 1:15 PM: Alex Speier of WEEI.com passes along a timetable that lets us know that the  MLB offices are only open a half day tomorrow. He also passes this along from an acquaintance of Teixeira.

at least one acquaintance of Teixeira said that, while the first baseman prefers to make a decision by Christmas, he wouldn’t be shocked if the 28-year-old allowed the process to continue into the early weeks of January if he and agent Scott Boras believed that it would lead to a better deal.

Update 2:10 PM: Jon Heyman of SI.com says the Yankees are also involved. He also believes that Teixeira’s decision will come this afternoon.