Tonight is not a must-win game for the Rays, being as it's only July and they've already won this series, but it is a golden opportunity.
Think about it: The Rays best starter (Price) going against a severely wounded and seemingly snakebit (Youkilis? Seriously?) division rival with a chance to sweep AT HOME and put that rival 2.5 games back (as opposed to a mere .5, which really isn't a lead at all at this point in the season). If the Rays don't win this game and eventually fall short of the post season by a handful of games, this will be one they look back at with regret.