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It's been a rather exciting season thus far in Sprint Cup. Through 21 races, plenty of different drivers have generated big headlines.

There's been Dale Earnhardt Jr.'s win in the season-opening Daytona 500 and two wins at Pocono.

There's been Jimmie Johnson's quest for a record-tying seventh Sprint Cup championship.

There's been the outstanding success from Team Penske's two drivers, Brad Keselowski and Joey Logano. Combined, the duo has won almost one-fourth of the races on the Cup schedule thus far.

There's been plenty of talk about drivers such as Matt Kenseth, Tony Stewart, Kasey Kahne and others who have yet to win a race thus far in 2014. And the odds of making the Chase for the Sprint Cup are getting increasingly long—if not impossible—for guys like Stewart and Kahne to make the playoffs without a win.

But there have also been a number of drivers who have had great success and, for one reason or another, have not received the recognition they deserve.

Let's look at eight of those drivers and why they've flown under the radar thus far this season.