Crank noises tend to be "creaks" at certain spots in the rotation. Bottom bracket bearings are usually felt (grinding feeling) as much as heard. If you are sure it's not pedals then you must have swapped them out for others and the noise didn't change. Bottom brackets don't wear out easily. How many miles on these parts?
Bought the bike from craigslist and he said he just regularly commuted throughout LA with it. I forgot to ask how many miles were on the parts. There's a SLIGHT grinding feeling (if we're on the same page on how it's supposed to feel) throughout the full rotation. Yes, it's definitely not the pedals.