It's only a matter of time before some zany radio talk-show host changes the words of ''I'm a Believer'' to ''I'm a Reliever'' in honor of Carlos Zambrano. And then I saw Lou's face; Now I'm a reliever. ... I'd get to that parody song right away if I were a radio guy because it won't be long before ''T.N.T.'' by AC/DC becomes more appropriate. It's impossible to look at this situation without seeing a Zambrano mushroom cloud on the horizon. The best-case scenario in the Big Z saga could be the worst-case scenario at the same time. If he pitches lights-out for the next month, the Cubs aren't going to be inclined to move him from the setup role back into the rotation. If Zambrano's history of volatility is any indication, the large right-hander will erupt and air travel will be affected for days. http://www.suntimes.com/sports/morrissey/2213490,CST-SPT-morrissey29.article