If the injury-depleted Mets have to run a gauntlet of the Phillies and Yankees over the next six days, they can think of no better way to open it than with Johan Santana on the mound. And that is exactly what is in store tonight at Citi Field in the first of a three-game set. In the notes, Jerry Manuel doesn’t plan to forget top prospect Fernando Martinez against Philadelphia, even though F-Mart is a left-handed hitter and the Phillies will be starting three lefties.