All joking aside on 44 year old Miguel Tejada, does it matter? He's obviously proving he can still hit. The biggest problem with him is convincing him he needs to play 1B or one of the corner outfield spots with his decline in range and defensive capabilities.
At 66 years of age, he's still maintaining an OBP that's normal for him while providing the more important parts of his game, slugging (over .530) and driving in runs (13 heading into today).
I imagine the front office is still a little pissed that Tejada is closer to registering for AARP than initially thought. I figure once he hits a slump, the age thing will loom heavy while John Kruk thinks of something funny to say on Baseball Tonight.