" THE METS are more seriously considering promoting from within (Fernando Martinez for the outfield, Jon Niese for the rotation, Bobby Parnell or Eddie Kunz if a bullpen arm is needed) then making a trade between now and the July 31 deadline, Omar Minaya told The Post yesterday. Minaya faces three major obstacles to reaching outside the organization for improvements: 1) The organization is cautiously optimistic Ryan Church will soon return, making a righty-hitting left fielder to replace out-for-the-season Moises Alou the main priority. Minaya has been unable to identify a player significantly better than a Fernando Tatis/Endy Chavez platoon to make it worthwhile to sacrifice prospect chips."