|Born||July 4, 1964|
Spartanburg, South Carolina, United States
Steven 'Steve' Addington (born July 4, 1964) is an American NASCAR Sprint Cup crew chief who is a free agent and formerly was the competition director for the #15 Chevrolet driven by Clint Bowyer for HScott Motorsports. Previously, he was the crew chief for Justin Allgaier, Tony Stewart, Kurt Busch, Kyle Busch, and J.J. Yeley in the Cup Series.  Before that, he was a long-time crew chief in the Busch Series (now Xfinity Series), most recently for Mike Bliss, as well as an extended partnership with Jason Keller.
Addington was born in Spartanburg, South Carolina. As a kid, he was a fan of dirt track races. At age 14, Addington's mother remarried and then the family moved to Batesville, Arkansas where his stepfather began working for Mark Martin.
Although his stepfather worked for a successful Martin, Addington preferred to play football. He graduated from Central High School in Texas and moved back to Spartanburg. Addington's start in racing came as he helped friends compete in dirt cars.
Addington worked as Jason Keller's crew chief in the Busch Series, and the combination resulted in 10 wins, seven Top 10s, and finished in the season points. Addington worked in 2004 as the Joe Gibbs Racing crew chief for their #20 NASCAR Busch Series. Driver Mike Bliss finished fifth in points.
In 2005, Addington was named the crew chief for Joe Gibbs Racing's #18 car driven by Bobby Labonte, replacing Mike "Fatback" McSwain. Labonte left for Petty Enterprises and was replaced by J. J. Yeley for two years. Kyle Busch replaced Yeley as the driver of the #18 car in 2008 and Addington remained as the crew chief. NASCAR observer's did not know what to expect from the combination, as the team did not just change its driver. It also changed from a Chevrolet car to a Toyota. On March 9, 2008, Addington scored his first win as a NASCAR Sprint Cup crew chief when the 18 team won the Kobalt Tools 500 in Atlanta, Georgia with driver Kyle Busch, and he was awarded the "Crew Chief of the Race". Busch lead the points with eight wins going into the Chase for the Cup. The team had numerous problems as soon as the Chase started, such as engine failures and wrecks, and Busch finished tenth in the twelve drivers in the Chase. Addington was named the DirecTV Crew Chief of the Year Award at NASCAR's award banquet. Busch ended the season with 21 victories in NASCAR's big three divisions (Sprint Cup, Nationwide, and Craftsman Truck Series), which was seven more wins that any driver had made since the Craftman Truck Series began in 1995. Busch said "I think the final ten races certainly humbled all of us. Everyone already had virtually guaranteed us the championship after seeing the first 26 races, but it changed so quickly." Addington was relieved of his crew chief duties with three races left in the 2009 season and Dave Rogers took over the role.
On December 14, 2009, it was reported that Addington had accepted a deal to become the next crew chief for Kyle's brother Kurt Busch, replacing outgoing crew chief Pat Tryson, who had been relieved of his duties following the 2009 Sprint Cup Season. It is reported that the deal is for three years.
Addington ended his tenure as Busch's crew chief at the end of 2011. He joined Stewart-Haas Racing (SHR) owner/driver #14 Tony Stewart and Team Chevy, taking over for 2011 Sprint Cup Champion-winning crew chief Darian Grubb. Addington and Stewart had previous worked together at Joe Gibbs Racing. Addington was relieved of his duties as crew chief of the 14 on November 19, 2013.
On November 21, 2013, it was announced that Addington would join HScott Motorsports in 2014 as a crew chief and competition director. On February 5, 2014, just days before the Daytona 500, it was confirmed that Addington would serve as the crew chief for the #51 team, whose driver would be Rookie of the Year candidate Justin Allgaier. 
In 2016, HScott Motorsports closed after the season ended, leaving Addington a free agent.
Addington left qualifying early for the June 2008 race at Dover International Speedway to attend his daughter Ashlyn's graduation from Boiling Springs High School in Boiling Springs, South Carolina.
- Menzer, Joe (September 30, 2008). "1on1: Steve Addington". NASCAR. Retrieved 2009-02-07.
- http://www.truespeedcommunication.com/media_kits/no._18_mms_%7C_interstate_batteries/2009%20Steve%20Addington%20Bio.pdf[permanent dead link]
- McGee, Ryan (February 1, 2005). "In Addington, Labonte trusts for turnaround". Fox Sports. Archived from the original on January 23, 2013. Retrieved 2009-02-07.
- Caraviello, David (June 2, 2008). "Cool Addington the ice to hard-charging Busch's fire". NASCAR. Retrieved 2009-02-07.
- "Busch going 'title or bust'". Yahoo UK. February 7, 2009. Retrieved 2009-02-07.[dead link]
- "KYLE BUSCH - What a Difference a Year Makes". The Auto Channel. February 6, 2009. Retrieved 2009-02-07.
- "Steve Addington named WYPALL* Wipers "Crew Chief of the Race" in Atlanta". Speedway Media. March 11, 2008. Retrieved 2009-02-07.[permanent dead link]
- Fryer, Jenna (September 27, 2008). "The Drill: Q&A with NASCAR crew chief Steve Addington". Milwaukee Journal-Sentinel. Associated Press. Retrieved 2009-02-07.
- "Steve Addington". Speed TV. December 2008. Archived from the original on 2011-06-17. Retrieved 2009-02-07.
- Fryer, Jenna (2013-11-21). "Steve Addington to lead Phoenix Racing". Yahoo! Sports. Retrieved 2013-11-21.
- Steve Addington crew chief statistics at Racing-Reference