Richard Carmona says he won't be running for Arizona governor in 2014.
The unsuccessful Democratic nominee for Senate last year said he may run again for public office, but not so soon.
Carmona posted the following on his Facebook page:
Friends, I can't thank you enough for all you invested in me and our race last year.
After all the friends I've made and all the wonderful people I've met, I know this isn't the end of the road. I'm not ruling out seeking elected office in the future, but right now isn't the right time for me or my family to embark on a campaign to become the next Governor of Arizona.
As you know, I've never aspired to be a politician - I've always believed in selfless service. I hope that's what some of you took from our race last year: that the greatest calling in life is to serve others, in and out of public life, regardless of politics.
Thank you for all your encouragement, support & continued friendship. There's a lot to be proud of, a lot of thanks to go around and a lot of work to still be done.
Carmona lost a tight Senate race to Republican Jeff Flake and was considered strongly positioned for the Democratic nomination for governor.
Former Democratic National Committeeman Fred DuVal is exploring a candidacy for governor, and state House Minority Leader Chad Campbell also has signaled he's interested.
Former Tempe Mayor Hugh Hallman is running for the Republican nomination. Other Republicans who may run include Secretary of State Ken Bennett, state Treasurer Doug Ducey and Mesa Mayor Scott Smith.
Copyright 2013 Associated Press. All rights reserved. CBS 5 (KPHO Broadcasting Corporation) contributed to this report.