The Washington Nationals are zeroing in on Cubs bench coach Dave Martinez as their next manager, and that will mean even more changes to Joe Maddon's staff in an offseason already full of surprises. Martinez interviewed in Washington late last week and had been viewed as an early frontrunner for a job that comes with World Series-or-else expectations. Jon Heyman of MLB Network and FanRag Sports first reported Sunday morning that the Nationals are expected to announce the Martinez hire once the Los Angeles Dodgers and Houston Astros finish this year's World Series, ending Major League Baseball's news blackout.