If not, you might want to consider getting one. Especially if you're outside the Michigan area, and want to keep up on your Detroit Tigers.
From Engadget:
We've always loved the Roku Video Player, and it's getting even more flexible over time -- in addition to Netflix and Amazon video rentals, the $99 box can now play, pause, and rewind live HD baseball games in 720p from MLB.TV, as well as play archived games from the previous week on demand. You'll have to pay the one-time MLB.TV subscription fee of $35, but that's not terrible, especially if you're an out-of-market fan looking to catch your favorite team without having to trek out to a bar.
I've been eyeing a Roku player anyway, for the next time I had $100 in my pocket to burn. Add baseball to that, and this is looking like a must-buy.
Thanks to allikazoo for sending this one over.