Usually Diaz would have to cut down to 155, destroying and weakening his body in the process; impeding his prime performance. This time around his body will not have to suffer such a large weight cut. His performance will not be hindered as much, especially since the recent IV ban, which makes getting back up to a healthy weight after a tough weight cut extremely difficult. You may argue that 10 days of preparation is not enough to face someone as skilled as Mcgregor, while I agree with this argument, based on looking Diaz's Instagram posts and listening to the comments he made about being constantly called to fight Mcgregor, I believe Diaz has been preparing a lot more than just 10 days to fight Mcgregor. We all saw how motivated Diaz came in when he fought Johnson. Did his motivation just plummet and did he just stop training after the Johnson fight? No; I believe he spent the last couple of months training for Mcgregor. Diaz also stated today that he was ready to fight Mcgregor at 155. Some may argue that Diaz clearly was not ready, hence the fight being at 170, but I believe that Diaz was just trying to get the most out of the fight as possible. If Diaz could negotiate his way into fighting at 170, which will allow him to perform a lot better and give him a big size advantage, why should he not? I believe people will start to take note of what I speak of during the weigh ins, and will become apparent during the fight.