Fans of the Los Angeles Dodgers weren't the only ones to experience a pitching scare on Friday. After Chicago Cubs manager Joe Maddon announced left-hander Jon Lester will be scratched from his scheduled Saturday start as he works through a "dead arm period," we're sure more than a few hearts skipped a beat or two in Chicago. But until the Cubs show concern beyond giving Lester a few days extra rest, Cubs fans should be able to breathe easy, or as easy as fans subjected to over 100 years of disappointment can breathe we should say. The phrase "dead arm" or "tired arm" is commonly heard throughout spring training. As pitchers prepare for the regular season workload that lites ahead, they often go through periods where the arm doesn't feel right. The most common cause is fatigue, hence the term tired arm, and that's what the Cubs anticipate is the issue with Lester. "A lot of times, when you talk to a pitcher and you ask how they're feeling, when a guy smiles easily and talks easily and is upbeat about it, it's a pretty good indication [everything's good], and he was all of that," Maddon said. "I really feel well or strongly that he's going to be OK." After signing a six-year, $155...