Lawrence Joseph McReynolds III (born January 10, 1959) is a NASCAR crew chief and current racing analyst on Fox Sports as well as a columnist on Foxsports.com.

McReynolds and Allison combined to win 11 races and three pole positions between 1991 and mid-1993, establishing himself as one of the sport's elite crew chiefs.

After Allison died in 1993 following a helicopter crash, McReynolds began working with driver Ernie Irvan, who left his ride at Morgan-McClure Motorsports under controversial circumstances to take over for his fallen friend.

Immediately the partnership paid dividends, as Irvan won two of the nine races he drove the #28 and recorded six top five finishes.

McReynolds helped drive the success of the #28 the next year as Irvan won three times and was a strong contender to unseat Dale Earnhardt as champion.

He said, once he found out of the extent of Irvan’s injury and the likelihood that he might not survive, he was ready to leave motorsports altogether having had two of his drivers die while he was leading their pit crews.

McReynolds' success and thorough approach to his profession earned him selection to the Copenhagen/Skoal All-Pro Team, an all-star "who's who" of crew members, for five straight years (1991–1995), and the 1998 UAW GM Teamwork of Excellence award.

On April 17, 2022, McReynolds announced that he would make his return as a NASCAR crew chief, working with Jeffrey Earnhardt at the 2022 Ag-Pro 300 for Richard Childress Racing.

31 Chevrolet and ventured into the Fox Sports broadcast booth with Mike Joy and 3-time Winston Cup champion Darrell Waltrip.

In 2009, McReynolds received the Living Legends of Auto Racing Russ Moyer Media Award.

McReynolds also co-hosted the NASCAR Performance Show with Steve Post on Motor Racing Network (MRN) between 2004 and 2013, and co-authored the books The Big Picture: My Life from Pit Road to the Broadcast Booth and How to Become a Winning Crew Chief.