Parker Edward Retzlaff (born May 21, 2003) /raɪtzˈlɒf/ is an American professional stock car racing driver.

In 2012, at nine years old, Retzlaff competed in the Wisconsin Junior Sprints, where he won the mid-season championship.

He competed in the Wisconsin Bandolero Series in 2013, finishing 3rd in points, and winning the championship a year later.

He returned in 2021, driving in the paired East series race at the Milwaukee Mile.

In 2023, Retzlaff returned to ARCA competition and drove for Young's Motorsports in the road course races at Portland and Sonoma.

On December 3, 2021, Retzlaff would sign with RSS Racing for a part-time effort in the 2022 NASCAR Xfinity Series, driving the No.

A fuel pump issue would end Retzlaff's race on lap 158, finishing 36th.

[14] On September 26, 2022, it was revealed that Retzlaff would make his NASCAR Camping World Truck Series debut at Talladega Superspeedway, driving the No.

[15] On May 30, 2024, it was originally announced that Retzlaff would make his NASCAR Cup Series debut at Daytona International Speedway in August, driving the No.

66 for MBM Motorsports during the Cook Out 400 at Richmond Raceway, as he was required to make a non-superspeedway start before Daytona.

* Season still in progress 1 Ineligible for series points (key) (Bold – Pole position awarded by qualifying time.