Rich made a very good point yesterday that strikers will generally fare better off the bench than from the starting lineup. Indeed, this holds true for us (including Clint Dempsey's appearances through January, since he was mostly played in the midfield after that):

Last season, about 59% of all goals scored in the league came in the second half, and over 26% came in the final 15 minutes. Should teams start games with their best goalscorers on the bench, and let a McBride or Helguson try and wear down the defence for 60 minutes? That's probably not the best tactic for most games (as a majority of goals are still scored by starters), but in situations where you may be overmatched and playing for a draw, it might be a way to steal a few points.

I think I see the beginnings of a stamina rating.