A few days after Darin Erstad interviewed for the Los Angeles Dodgers manager's job, he was working with a few of his University of Nebraska players in the batting cage when he had an epiphany. By all accounts, Erstad had impressed the Dodgers' brass and was a finalist. ''I had that feeling of, 'What am I doing?''' Erstad said, shaking his head and raising his voice during an interview in his office.