RICHMOND, Va. — Mild-mannered Matt Kenseth is spitting mad at NASCAR. The driver for Joe Gibbs Racing spoke out Thursday, one day after his team was slapped with some of the harshest penalties in NASCAR history because his race-winning car at Kansas last week failed post-race inspection. The failure came because one of eight connecting rods in the engine was too light — by 2.7 grams, according to Kenseth, who said the rods collectively weighed more than necessary by about 2.5 grams each. "I think the penalties are grossly unfair," Kenseth said.