By Tom Verducci This season the home run rate has taken its biggest drop in 34 years, but baseball is not on its way to another Deadball Era. View the original article to see embedded media. Welcome to The Opener, where every weekday morning during the regular season you’ll get a fresh, topical story to start your day from one of SI.com’s MLB writers. As the home run rate in 2005 took its steepest decline in 17 years, scouts had a favorite line to explain why certain sluggers were not hitting as many home runs: “Congress got him.” The inference was that testing for steroids with penalties, whi…