Because I have severe ADD I feel the need to look ahead to next year's team despite the 2005 edition being 1 game back of the wild card.
That said, here is what I think the 2006 Marlins will looks like:

 C Lo Duca
1B Delgado
2B Castillo
SS Damion Easley
3B Lowell
LF Cabrera
CF Pierre
RF Jeremy Hermida

SP Willis
SP Beckett
SP Jason Vargas
SP Scott Olsen
SP Moehler/Josh Johnson

CL Anyone but Todd Jones
RP Mota
RP Villone

The point of this exercise? The Marlins aren't losing any key free agents next year other than A.J. Burnett, who the Marlins are guaranteed to have a good, young replacement for thanks to some timely call-ups this year. I don't think Encarancion will be back, which is fine because I see Jeremy Hermida producing on the same level as the Braves' Jeff Francouer. AGon will probably sign with the White Sox, and for 3.5 mil a year or so, I don't want him anyway. The Marlins are probably facing an Armando Benitez situation with Todd Jones. He is unlikely to repeat this season anyway, so the Yankees or Red Sox are welcome to go ahead and pay him triple what he'll be worth next year. I'm sure Beinfest will find another gem from the bargain bin who will end up being our only dependable reliever (until we trade Chris Resop for someone in July). Moehler, similar to Jones, is unlikely to repeat his stellar performance this year, and if the Marlins can't resign him cheaply then we are probably looking at Josh Johnson as the 3rd (very) young gun in the rotation.

If Lowell and Pierre return to form next season, and none of this year's key contributors suffer any major injuries and/or Lowell-itis, the Marlins should win the NL East next year.

Then again, looking at their present roster, they should be winning the NL East right now.