fwiw, i looked up some projections for blanco and this is what they have: pecota: .267/.320/.377/.697 bill james: .256/.301/.349/.650 CHONE: .265/.314/.368/.683 Marcel: .268/.333/.410/.743 Averaging those, you get .264/.317/.376/.693. Theriot's projections: pecota: .284/.356/.370/.726 bill james: .284/.352/.357/.709 CHONE: .280/.350/.367/.717 Marcel: .281/.348/.363/.712 Averaging those, you get .282/.352/.364/.716. i guess it comes down to a couple of things. one, with theriot you are fairly certain that you're getting a line like the ones you see above - he's been a regular player for a couple of years now and you know what you're going to get. blanco might be able to hit at that line above, but he's been a pretty weak hitter for much of his major league career and is largely unproven against major league pitchers. the other question is, how much better is blanco's defense than theriot's? the metrics seem to suggest they're pretty close in terms of ability, but the scouting reports on blanco's defense have always been very positive, and he looked really strong with the cubs last year. i dunno, blanco's recent development gives me some optimism. you can also look at omar vizquel's first eight years as a professional player, if you want more reason to feel optimistic. vizquel basically could not hit for beans until he reached his mid 20s, but then he became a very useful player. he always had a pretty good eye and the ability to make contact, but did not hit the ball with any authority. that said, blanco doesn't have as good an eye as vizquel had as a minor leaguer, and there is also the example of rey ordonez, who made contact and drew a few walks but was a God-awful hitter. but he never flashed the power that blanco showed with iowa last year. when it all comes down to it, i'm not convinced that theriot will be that much better than blanco this year. theriot has tended to wear down during the second half of the season, and we have castro coming along, so maybe the most prudent thing to do is keep theriot around through midyear and then shop him around. but if blanco is hitting the ball with authority in spring training and castro looks like he's not far from the majors, i'd look seriously into dealing theriot away.