This was the final NASCAR race for driver Marcos Ambrose, who will be returning to V8 Supercars in his native Australia next season. It was also the final NASCAR race for crew chief Steve Letarte, who will be leaving Hendrick Motorsports, where he's worked at since he was 16, and moving to the broadcast booth for NBC Sports next season. After four decades of being a crew chief and winning races in four decades, Jimmy Fennig retired from the sport after the checked flag flew. “Racing is what makes him tick and the competition,’‘ Matt Kenseth said of Fennig. “It’s hard to argue that Jimmy isn’t one of the best crew chiefs in the garage. There’s not many people that have been in the sport as long as he has and remained relevant and competitive as long as he has. I’ll never forget when we won the Daytona 500 in 2012 and he was smiling and said, ‘The last time I was here was 25 years ago with Bobby Allison – that was the last time I won the Daytona 500.’ When you think about that and all the changes that this sport has had with technology and the cars and engineering and all that stuff compared to where we started, it really says something about somebody that’s still that competitive today.” “Jimmy somehow finds more time in the day and finds a way to work harder than almost anybody I’ve ever met," Carl Edwards said. "He cares as much or more about winning than anyone I’ve ever been around, so to me Jimmy has been a huge positive influence on me and my driving and he’s a friend.’’