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PIT CREW
Each member of a pit crew serves a vital role to the team's success; the members of the O.K. One Stop pit crew are no exception.  Without the help of his team John would not be able to compete week after week.  the current members of John's crew are:

Don Klynsma
- John's brother Don joined the pit crew following John's first night at Park Jefferson.  Before that night, Don could have cared less about racing, but was hooked during that one night in the stands.  Although Don was not (and still is not) mechanically gifted, he has been able to pick up on the finer points of racing over the past 14 seasons.  He is the only member of the current crew that has been with John through each of his 14 seasons.  His primary contribution to the team is acting as "coach" for John prior to and during the races.  He makes sure John is in the lineup area on time and in the right spot for each race.  Don can be seen in the lineup area prior to the race discussing with John just where the fastest groove is going to be, and helping to identify the fast or problematic cars starting around him.

Don lives in Sioux City with his wife Tammy and three children Jeffrey (7), Dylan (5), & Sophie (2).  He works as a tax manager with the Sioux City accounting firm of Henjes, Conner, Williams, & Grimsley, LLP.  Although he is a member of the crew, he considers himself one of John's biggest fans!


Bill Rolfes
- Bill joined the team in 1997, as John was just beginning to race in the Modified division at Park Jefferson.  He helped put John's first modified together.  Bill is the Chassis Specialist on the pit crew, always willing to climb under the car and make last minute chassis adjustments.  Bill's help on Saturday night and during the week is invaluable to John and the rest of the team.

Bill lives in LeMars, IA, and works as a mechanic at O.K. One Stop in Hospers. Bill's Dodge Ram pickups have doubled as the official O.K. One Stop Pace Truck at the Sioux Speedway and Park Jefferson.  Bill is also an avid drag racing fan, making trips each year to Topeka, KS and Brainerd, MN for the NHRA events there.  Thanks for all your help Bill!


Larry Davis
- Crew Chief Larry joined the team in June 2000.  He is John's neighbor in Hospers and was definitely willing to give that extra effort to help make the team successful.   Larry spends most Saturdays during the season making final adjustments to the car before heading to the track.

Larry lives in Hospers, IA and works at Den Hartog Industries, Inc. in Hospers.  He too is an avid NHRA fan and went to his first NASCAR Winston Cup race in August 2000 with John & Don.  Thanks for being so willing to help out and give of your time Larry!

Chad Jasper - Chad is John's nephew and also works at the O.K. One Stop as a mechanic.  Chad joined the crew in 2001 but has been a fan of John's since he started racing in 1991.  He helps out with the weekly and at the track maintenance.  Chad and his wife Amanda got married during the 2003 season on the day of John's first 2003 win.

Clint Jasper - Clint is Chad's brother and John's nephew.  A 2002 graduate of Unity Christian high school Clint joined the crew in 2002, and helps out with whatever needs to be done.  Clint attends college in Sioux Falls, SD.