I'd say it's drafting and developing skill as opposed to luck.When I see a 5th rd. selection and UDFA OL'ers move into heavy periods of offensive snaps for outstanding OL'ers like Havenstein & Dotson and the effectiveness of the OL play remains strong.....IMO that's lucky. History has not always been kind to the Rams in this area as you well know.
You will not find any posts from me or get any arguments from me stating Ram OL'ers like Quessenberry/ Dedich/ McClendon are anything less than well coached. I am very pleased with the 3 OL coaches.