Which Sprint Cup driver will break a winless streak next?

Martin Truex Jr.‘s emphatic victory at Sonoma Raceway was noteworthy on many levels.

First, Truex snapped a personal six-year, 218-race winless streak dating back to his first Sprint Cup win at Dover in June 2007. The victory also set a NASCAR record for the longest span between a driver’s first and second win, previously held by Jamie McMurray (165 races).

Here are the five full-time drivers with the longest winless streaks heading into Saturday’s race at Kentucky Speedway.

1. Bobby Labonte
Span: 340 races
Last win: Homestead, Nov. 16, 2003

2. Casey Mears
Span: 205 races
Last win: Charlotte, May 27, 2007

3. Jeff Burton
Span: 165 races
Last win: Charlotte, Oct. 11, 2008

4. Juan Pablo Montoya
Span: 102 races
Last win: Watkins Glen, Aug. 8, 2010

5. David Reutimann
Span: 94 races
Last win: Chicagoland, July 10, 2010

Of the names above, it appears Labonte, Mears and Reutimann are going to have difficulty finding the winner’s circle anytime soon. All three currently drive for small teams and each struggles with competitiveness -- Mears’ 14th-place finish at Phoenix represents the best result of the season for the trio.

In regard to Burton, he is still aligned with Richard Childress Racing and before this past weekend had a four-race stretch where he finished no worse than 12th.

But at age 45 are Burton’s best days behind him? Maybe, maybe not as Harry Gant, Dale Earnhardt, Bobby Allison and Mark Martin all won races past that age.

The one driver on this list who has the absolute best shot at returning to the winner’s circle is Juan Pablo Montoya. Already this season he has challenged for victories at Richmond, Dover and Sonoma and with some favorable tracks upcoming (Indianapolis, Watkins Glen), career win No. 3 is certainly attainable.