Hello, I have the following text string and I need to see how I can keep the text AFTER the second to Last Comma.

I have:
12/08/2015 15:36 EL PASO, TX 79906, 12/12/2015 14:12 HERMOSILLO, SON 83000

I want to keep:
12/12/2015 14:12 HERMOSILLO, SON 83000

I have been using a RIGHT function but since the length of the text string varies, I have to go in manually and clean it up. Need to know if there is an easier way. I have seen how you do it to the LEFT of a comma but not to the RIGHT. Thanks for your help!