LOL, really. He won 82 on a team that won 97 the year before. Three of the other four years he had horrific winning percentages. You can try to make a case of why but not he's a winning manager.
How many world series did the manager before him win? Zero. Martinez took an 82 win team and turned them in to world champions.
Why? Because unlike Dusty Baker, Martinez knows how to win in the postseason. By not pitching your scrubs in meaningful situations.
