Tony Stewart's frustration runneth over after his sixth finish of 30th or worse came Saturday night at the SpongeBob Squarepants 400 in Kansas City.

Is the three-time Sprint Cup champion cursed?

Has Tony Stewart lost his mental edge because of his inactivity the last two seasons?

For the second time in three weeks, Stewart vented his anger toward another driver to his crew chief over the radio, Foxsports.com reported.

Matt Kenseth's spin-out on lap 129 at the Kansas Speedway forced several cars to go high to avoid him. When Brett Moffitt in the No. 34 car went high, he clipped Stewart's right rear quarter panel and sent the three-time Sprint Cup champion into the wall.

Tony Stewart hurls expletive at Dale Earnhardt Jr. after collision leads to Stewart spinout and race exit

"After the contact, Stewart was upset with the young driver over the team's radio," Foxsports.com reported.

The collision caused significant damage in Stewart's car. He was able to continue when the race restarted on lap 135, but Stewart finished 39th

.

Stewart cursed Dale Earnhardt Jr. at the Toyota Owners 400 in Richmond last month when the two bumped cars, and Stewart spun out to the bottom of the track and was unable to restart his car.

"Smoke" now has gone 52 consecutive races without a win. Stewart last won on June 2, 2013 in Dover. He suffered a broken leg in 2013 that wiped out the last three months of his season.

However, since the tragic death of Kevin Ward Jr., last August at a dirt-track race in upstate New York in which Stewart inadvertently hit Ward and sent him hurling 50 feet forward, Stewart has finished 30th or worse in 10 of the 24 races he's entered.

He has had two top-10 finishes in that span.

The three-time Sprint Cup champion has blamed his struggles this year on a change in NASCAR rules that have reduced the horsepower of the cars the drivers are racing.

But is Stewart's driving to blame, is it simply bad luck or is Stewart cursed?

Do you think Tony Stewart is cursed? Comment below or tell us @SportsWN.