Chad Norris will be the new crew chief for Carl Edwards and the No. 99 Ford team effective immediately after Bob Osborne abruptly announced he must step aside due to health concerns.

"I have had the pleasure of working with Carl Edwards for the past nine years and, during that time, my focus has been building a championship-caliber program," Osborne said in news release. "At this time in my life, however, concerns with my health have necessitated that I change my role within the organization."

Osborne has accepted a senior management position with Roush Fenway Racing. He helped Edwards to 18 wins and two second-place finishes in the points race. His role predated Edwards' reign as driver of the No. 99 car beginning at midseason in 2004.

"I cannot say enough good things about Bob Osborne," said Edwards, who was edged out by Tony Stewart in the Chase for the Sprint Cup title as the result of a final-race tiebreaker last season. "I'm so thankful for what he's done for me as a driver, and he is without a doubt one of the smartest guys in the sport. I'm also appreciative of the fact that he'll continue to be a resource for me and our team as we focus on these final races."

Norris and Edwards are familiar with one another as Roush teammates. Norris has been a crew chief in the Nationwide and Truck Series since 2005 with a limited Sprint Cup docket as crew chief for No. 6 Ford driver Ricky Stenhouse Jr. He's also responsible for the Roush Fenway Racing testing program.

Edwards is 11th in the current Chase point standings, transitioning to a new crew leader while scrapping to qualify for the postseason races. He last won in March 2011 at Las Vegas.