Where may some of the drivers looking end up in 2010

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Where may some of the drivers looking end up in 2010? Those drivers looking for rides in 2010  #07-Casey Mears, #96/71-Bobby Labonte, #43-Reed Sorenson and #12-David Stremme  qualified sixth, eighth, ninth and 11th, respectively at Martinsville. How their futures pan out could depend on the status of Jamie McMurray, who remains the top candidate for the #1 Earnhardt Ganassi ride. Mears could stay put in the #07 if sponsorship can be found. Labonte is a strong candidate for one of the two TRG [#71 team] Racing rides. Sorenson is the favorite for the vacancy at Braun Racing [Nationwide Series ride] and Stremme's name has been mentioned for the #34 Front Row Motorsports car[currently a Chevy] (where he would be reunited with crew chief Steven 'Bones' Lane) or in a Nationwide car with Rusty Wallace Inc.(FoxSports)(10-24-2009)

I really don't understand why drivers start racing better towards the end of their contract...Why not just try to run well all the time...Casey Mears is a fine example of that..He runs well for a little while, then fades...when his ride is questionable, he starts pulling off better finishes..