His run support has been great, but his personal stats have been shit.
I'll look up some numbers....
Glavine's high point was on May 4th, when the Mets were 5-2 in games that he started, and he had a 1.94 E.R.A. in 46 IPs.
Glavine was pitching great, and the Mets weren't scoring all that many runs behind him - only 2.86 per game.
But since May 4th, Glavine has started 17 times, with an E.R.A. of 4.89, and if you graphed his performance this season, he's basically been getting worse as the season has prgressed - it's not like he had one bad stretch which caused his numbers to baloon.
In any case, in those 17 starts the Mets are 14-3 behind him, mostly because they've scored 109 runs, or 6.4 per game.