Which is a bigger problem the bullpen our our offense?

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I have never been a Wheeler or Qualls fan, in fact I have grouped them together and now call them Queeller. And Lidge seems to have lost whatever he had, but I am not totally sure that the bullpen is our main concern. Yes, today they gave up seven runs after we were already down 3-0 in the 7th, and yes they blew the first two games of the season, but with the offensive adjustments we have made over the offseason, with Lee and starting Scott, we should be killing the ball and ending games like most American leagues games end (11-7 or something high scoring). Let me hear some of your input about this season for the Houston Astros? What needs to be done?