2 lca from 2 different employers

[Being]

hi ,

I am working with employer A and have offer from employer B.

My H1b visa expires on sep 30 2015 , my current employer(A) is willing to initiate extension(normal processing)

I am interested to move to employer B , who is also willing to initiate extension(premium)

Will there be any problem if I move to employer B at this point of time.

Kindly suggest the best.

Thank you