A terse look at his numbers for the year (6.91 era, 1.57 whip), and you think this should be an easy night for the Mets. But it is much based on a whole lot of bad luck.
Dempster is in his 14th major league season, and has thrown 200+ innings each of the past 3 years. He has a 4 & 2 seam fastball (90 mph, 54%), a plus slider (85 mph, 34%), and a split finger (82 mph, 12%). He's a groundball pitcher, but he's been victimized by the long ball this year (20.4% of his fly balls have been Home runs; league and career average is 11%). He's still striking out a respectable number(8.3), and limiting walks (3.3), but his bapip is .333, and lob % is 61.7 ( career is 71.6%), which should regress back to the norm. His FIP is 4.83, so he should be better than his current ERA stands.