Can I move to the new employer after I-94 expiration ?

Hello,

I am working for the employer A and I have my I-94 validity till Sep -30th,2013.Employer A filed the extension on Jul 30th,2013 and it is in Initial Review status.



Employer B filed the transfer on Sep 21,2013 and got approval on Sep 27,2013



Can I join the new employer after my I-94 expiration or do I need to wait till my extension with the employer A is approved?