Contrary to popular belief, Mike West did not reprise his role as Fox McCloud in the English dub of the anime short film Star Fox Zero: The Battle Begins. I personally would not blame you, as for some reason Nintendo failed to credit any voice actors in the short itself, but this is likely for localisation reasons. In any case, the honour of voicing Fox McCloud in the English dub actually goes to Joe Zieja.
Zieja is best known as the author of the upcoming "Epic Failure" trilogy (in which the first book Mechanical Failure is now available) rather than his voice work, although his role as Fox McCloud in the short is apparently his most prominent thus far. UK-based news outlet Nintendo Life recently interviewed Zieja to learn more about his experience getting the role and learn a little more about the man himself. You can read the full interview here.
If you are interested in further information, check out Joe Zieja's official website. Enjoy!