During Johan Santana's bullpen session the other day, he and Mets pitching coach Dan Warthen made an adjustment. "They made sure he was back with his delivery where he was when he threw the no-hitter," manager Terry Collins said yesterday. Well, that's a promising revelation because Santana was brilliant in his June 1 no-hitter and has been pretty messy since. Tonight against the Orioles will mark the Mets ace's third start since making history, and Santana is still searching for his first post-no-hitter quality outing.