Rob Arthur of Baseball Prospectus discusses the juiced ball, Astros sign-stealing, and the past and future of the human race. Plus John McGraw fights while Boston burns and a pitcher is mocked for his weight.TABLE OF CONTENTSWalter, not Jumbo*The Brief Story of “Jumbo Jim”*A Fire in Boston*Rob Arthur: Fruit Flies No Matter What*Malthus Was Right? (“Who’s Mathis?” Andy Asked)*WAR (What’s It Good For?)*The Hall of Fame and the Soft Factors*The Ball is Painfully, Obviously Juiced*Juiced Balls vs. Juiced Players*Manfred’s Reasons and Excuses*How Did We Miss the Astros’ Sign-Stealing?*Will the Real Alex Bregman Please Stand Up?*Mike Trout’s Genes vs. Yours*Goodbyes.