I'll continue the thread in here so the mods can clear up the other thread:
It's all down to what Winter was asking for. Winter clearly wanted a "left footed central defender", and he said so on several occasions. Mariner, I expect, was asked to find the BEST left footed CB that he could, that was available. Iro was clearly 1. available, and 2. a left footed centre back. So, did Mariner fail to find what he was asked to find - I would say no. He found exactly what he was asked to find. It's then up to Winter to get the player to play effectively. Winter failed to do this, not only with Iro, but with many players (including Dunfield).
If Winter had asked Mariner to find "a left footed central defender who already knows the 4-3-3 system and can play a short technical pass from the defense and play with his feet" - maybe Mariner just couldn't find that type of player! As we know, centre backs that can play technical football are VERY few and far between! And even fewer, are CB's who know the 4-3-3 system that Winter was playing and can play it. The issue with Winter, and player acquisitions, is that there are VERY few players within the MLS who can play what he was asking. His system isn't a simple 4-3-3, its a VERY complicated one. So, Mariner was very much stuck within the limitations of the MLS with the players he could acquire. This definitely isn't Mariner fault! Its not only Winter's problem, its the problem with the WHOLE of the MLS.
For Winter's system to work, TFC would have to go outside of the MLS and BUY the technically gifted players. As we know, this just isn't possible with the restrictions of the MLS. This isn't Mariner's Fault. The issue is that Mariner was being asked to do a job that is almost impossible to undertake - find players that can fit into Winter's system from a league that is full of players that are incapable of playing it. I'm fairly sure Mariner was doing the best he could with the limitations of 1. Winter and what he was looking for and 2. That TFC play in the MLS with all its rules and restrictions. This is why I don't blame Mariner at all.
If Iro was the best "available" and "left footed" centre back he could find at the time, then that's fine. In the MLS you simply can't 1. buy any player you want or 2. go beyond the rules of the league and the cap space. Winter's system needed to be outside of the MLS, where you can go and buy players, and bring in whoever you want with unlimited budget. But this IS the MLS, and it comes with a hell of a lot of restrictions.
Anselmi set up the structure of the club so that Mariner was in charge of finding players, and yet Winter was the one in charge of playing them. That is a massive lack of cohesion within the structure of the club. I find it hardly ever works in a football club. The coach should be the one who is finding the players he needs, not another guy.