It's not the amount of caps it's how they perform.
Cahill has proved he's good playing for a lesser side in England just because he doens't have 75 caps it doesn't matter.
Ian Wright never got that many caps for England but look how good he was.
I've only got bad memories of Mertersacker, going back 5 years.
Well, it says something about him that no big clubs have come in for Cahill and he's not a regular for England.
The fact Mertersacker is such a regular for Germany says to me that they think he performs quite well. And frankly, Germany are a much better international side than we are.
Let's see how he does, at least he's tall and we've all thought for years our team is too small. It may help with the infamous set piece problem.
Imagine you are a club that don't watch and read the English media. who would you get?
Mertesacker, 26, 2 WC played, 75 caps in the German national team which reached the top 4 both times
or
Cahill, 25, 3 caps in the England national team, no WC, no CL experience, playing for Bolton.
?
http://melonsgazette.blogspot.com the blog for Italian Gooner
Finally we sign a decent centre half.
This potentially is a very good piece of business. I do worry about Mertesacker's lack of pace but he's a proper Centre Half with bags of experience. He's quite young too.
He could potentially form an excellent partnership with Tommy V.