See Billfer. That's where I learned about it.
It's good to see Marcus Thames back up. He slaughtered Triple-A pitching, and maybe he'll play himself into a job somewhere. It's also good to see the Tigers call up a fifth outfielder, considering one of the top four can't play every day (Ordonez), one can't hit (Logan), and one is a rookie with ten at-bats against lefties this season (Granderson).
Speaking of being afraid of lefties, does anyone else think that if everything pans out for him, Granderson can grow up to be Jacque Jones? Reasonable pop, stark platoon splits, no patience, and good speed for a corner OF.