Interesting Over/Unders

I was surprised to see the Mets and Yanks over 9.5 at +105 today where I wager. 2 high powered offenses, with 2 sub par pitchers on the hill (yes I just called Randy sub par his days of being a top starter, or even somewhat consistent starter appear to be done). All but 3 of Johnson's starts have been under this year. Can anyone talk me out from not taking the over in this ball game?