Show me a scientific study about weight loss and its effect on power in baseball, oh yeah you can't because you don't have one. I'm sure according to you linemen should drop 100 pounds in football and they could block better and fighters should drop weight because they would hit harder. Fielder needs to lose weight for his long term health, not because it caused short term production losses. If he stays this heavy he will have health issues at a young age and his career will go south prematurely. Fielders K rate and BB rate did not significantly change last year, his BABIP was acutally higher than the previous year. His fielding was statistically right in line with 2007 as well. The biggest difference between his 2007 and 2008 seasons was a large drop in ISO. So he gained weight and lost power but it didn't affect anything else is what you are saying and it only really hurt his ISO for the first 2 months and then magically it stopped bothering him? I'm the one being unscientific here? Yeah whatever. It isn't worth arguing because you've already made up your mind and I'm sure if Fielder goes out and hits 45 HRs we'll get a bunch of I told you so the weight loss helped him type statements even though it most likely was just fluctuations you see every single year in baseball. Weeks ISO dropped a lot too, did he put on a bunch weight last year and I missed it? Oh yeah btw, in 2007 Fielder had 12 just enough HRs and 11 no doubters. In 2008 he had 6 just enoughs and 11 no doubters. In 2007 he had 2 insanely hot streaks, in 2008 he really had none. Those are your scientific reasons for the HR drop most likely, just how baseball is and why players don't put up the same stats every single season.