Pecota is a lot of fun, but taking it literally is dangerous. There is nothing in Todd Frazier's background to suggest he'll ever have a year like Headley had in 2012 or that he has a future like Headley will probably have. Headley was a legitimate MVP candidate in 2012; was a top 5 MLB 3rd baseman in 2011 (look at the road numbers and park effect). Frazier was a great stopgap in 2012 and a nice flexible piece on a World Championship contender.
Their pedigrees are nothing alike. Headley's career minor league line is almost exactly the magical .300/.400/.500 over 1663 plate appearances, almost all of which were completed before the age of 24. That's a thing of beauty. By contrast, Frazier amassed more than 1000 plate appearance at AAA alone, almost all of them AFTER he turned 24. His line at AAA: .261/.335/.453. Boo!
I'm totally behind Frazier as our future at third base, just like I was behind Chris Sabo, Ray Knight, Chris Stynes, and other scrappy players of their ilk. But assuming there were really a legitimate chance to land Headley in trade for a package in which the best player the Reds would have to give up would be Todd Frazier, the Reds would be out of their minds not to make that trade.