Because they dont get as injuried as someone prone like Polanco. Ordonez was hurt a couple years and pudge was a little. Pudge is probably one of the most durable catchers out there, period. Go ahead argue that one too.l

Polanco did play in the minors. He was drafted in 1994 with St. Louis, but played in the minors 4 years, then was brought up. Thing is he was 24 in 2002 and had 4 years under his belt in the MLB. So he wasnt in the minors at the same age as Infante is right now. I dont know where you came up with that, or really what that has to do with any of this, but yeah.
When it comes down to it. I think the Tigers will be fine, just that I personnally think Polanco is the all around better player period. He is prone to injury and that is his only down fall. Now if it was only a couple years where he got hurt, then Detriot or some other team would have given him a big contract, but he is signed for 4 years with Detriot.