Dale Jr. says this driver poses the biggest threat to his team's dominance

In the 2017 NASCAR Xfinity Series, JR Motorsports had the top three drivers in William Byron, Elliott Sadler, and Justin Allgaier.

But, there is one driver making his full-time debut and Dale Earnhardt Jr. feels that he could knock JR Motorsports out of the top. Christopher Bell won the Camping World Truck Series championship in 2017 and if he has it his way, the Xfinity Series championship will be next on his list.

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Earnhardt took to Twitter to share his thoughts on the young talent and the threat that he means to Dale Jr.'s racing team.

Bell ran eight races in the series for Joe Gibbs Racing last year, winning one of his races and adding five top-10's to that total. Pretty impressive numbers from a part-timer, so it's easy to see why Earnhardt sees him as such a threat.