A remarkable era of parity in Major League Baseball hit a bit of a snag this October when the big-spending New York Yankees, Los Angeles Dodgers and New York Mets finished as three of the top four teams in this year's postseason. Given several factors — particularly cash flow uncertainty due to the collapse of the regional sports network model — that could prove difficult. "It's going to be a challenge for Major League Baseball leadership," St. Louis Cardinals GM John Mozeliak said on Wednesday.