Kahne has 18 Cup Series wins in his 15-year Cup Series career including the 2017 Brickyard 400, when he held off Brad Keselowski and Jimmie Johnson in a insane finish to a insane race. It's time for me, as a dad, to help my kids pursue their dreams. His best finish this season is a fourth-place finish at Daytona International Speedway in July.
The former Hendrick Motorsports driver has 18 victories, including a playoff-clinching win last season at Indianapolis Motor Speedway.
Sadler, 43, has been in NASCAR competition since 1995.
Wyatt, 8, and Austyn, 6, are heavily involved in school and extracurricular activities.
Sadler also finished second in Xfinity in 2011 and 2012.
"I've had a great career in racing and met so many awesome people and fans along the way, some that I'll remain in touch with for life". In 12 full-time seasons in Cup he earned three wins, 19 top fives and eight poles. "The Sadler name has become synonymous with motorsports in Virginia".
He has 748 total starts across NASCAR's three national series, including 527 in the Cup Series.
Sadler admitted he began thinking about his retirement at the beginning of the season because he knew it was a contract year. He said Wednesday he'd like to spend more time with his two young children.
"NASCAR is a grueling schedule and I think maybe we're thinking more about our quality of life these days", Sadler said. But he never quite lived up to the hype after winning Rookie of the Year in 2004 in the No. 9 Dodge, at that time one of the most popular rides in the sport, having previously been driven by Bill Elliott. "So that's a pretty cool leg to stand on". That has not happened, but they have been good values on occasion.