Question

Are the commas in the right place?

894 Jenkins Blvd.,Knoxville, Tennessee 37901 June 12, 2001

Or

894 Jenkins Blvd. Knoxville, Tennessee 37901 June 12,2001

Answer 1

Commas come in after a list, to break a sentence apart, or in a clause.
In this case it would be a list.
(I'm guessing this is an address followed by a date later on)
894 Jenkins Blvd. Knoxville, Tennessee 37901
June 12, 2001.