User blog comment:NOhara24/I'm gonna need people to stop using the words "Uncommon Drop" when referring to legendary weapons./@comment-3436482-20121105133645

THANK YOU! That seems like a pretty accurate drop rate for Doc Mercy considering I've killed the SOB at least 1000 times by now and haven't gotten anything good.

Also, uncommon and rare can be specified as two different things depending on what you're comparing. Eridium being uncommon and legendaries being rare, that works.