Melvin previously had managed the Seattle Mariners from 2003 - 04 and the Arizona Diamondbacks from 2005 - 2009 .
Melvin will be 49 this month .
Melvin , who will be 49 this month , previously had managed the Seattle Mariners from 2003 - 04 and the Arizona Diamondbacks from 2005 - 2009 .