"Francisco Rodriguez had a good day. First he discovered what might be behind a recent pitching slump, and then he dominated the Brewers for his 17th save.

Before the Mets' 2-1 victory over the Brewers, Rodriguez was asked by The Post if he had lost any weight -- and perhaps energy -- as a result of getting two teeth pulled last week.

Rodriguez said he hadn't lost any weight, to his knowledge.

After the game, Rodriguez summoned a Post reporter, and said he weighed himself after being asked the earlier question. Stunned, Rodriguez discovered he has dropped 15 pounds since having the teeth extracted.

Rodriguez has consulted with team trainers and said he will attempt to regain the weight by eating five daily meals and drinking protein shakes.

But energy wasn't a problem last night for Rodriguez, who disposed of the Brewers in 13 pitches.

"It was about time I got 1-2-3 clean," said Rodriguez, who had allowed at least one run (five total) in each of his previous three appearances.

"I was able to command pitches and throw the ball where I wanted to."

Pitching coach Dan Warthen said Rodriguez appeared "crisper" last night."