Okay. From 1945 (the end of WWII) to 2007, there were 247 major league players who made their debut in their age 27 season and then got at least 1 plate appearance the next season. In their debut season, those players averaged a .291 wOBA; in the next season, those players averaged a .302 wOBA. (.338 is right about league average.) Theriot had a .302 wOBA last season. He seems exceedingly typical of the sort of player that makes their debut at age 27, by that standard. I wouldn't expect a big improvement out of Theriot this season based on this (admittedly slapped together) bit of trivia. (Caveats: I didn't adjust for park, and I did a lazy age calculation rather than figure out seasonal age. You could probably do a better study of the issue than what I've done here, but I think this suffices for my purposes.) Tell me if I'm wrong here, but this sounds like you're downplaying Theriot's worth based on historical analysis of other players who made their debut at age 27. Theriot made his debut at 25. His first (and so far only) full year was his age 27 year, which puts him in a significantly different category. That said, I'm still in favor of Cedeno over Theriot when the time to make that decision comes. But that's because Cedeno is better, not because Theriot is bad. I know it's not nearly the same thing, but this post made me think of all of the old "Pie will be terrible, look at Corey Patterson" posts we've seen over the last couple of years.