Is Tejada using Manny's bat??

[kylehess10]

I found a very odd photo of Miguel Tejada. It is from August 3,2005, when the Orioles were playing the Angels. If you take a good look at the bat he is holding, you'll see that "BOSTON RED SOX" is on it, and what possibly may be the signature of Manny Ramirez (too hard to tell though). What is Tejada doing with a bat belonging to a Red Sox player when they weren't even playing them?