Most mobsters don't have facial hair.

http://www.ibtimes.com/what-goodfellas-got-wrong-705683

"Moreover, DeSimone was tall, broad-shouldered and (unusually for a mobster) wore a moustache and long hair (the polar opposite of Joe Pesci)."

Who else, apart from DeSimone had facial hair while in the mob?

Stanfa did at some point. Persico did at some point. Little Allie Boy did at some point. Amuso & Casso did, but they were in disguise and on the run. Natale has/had facial hair but this may have been after he was in the mob.

I invoke my right under the 5th amendment of the United States constitution and decline to answer the question.