Recreational marijuana was recently legalized in Michigan and the former Lions stars want to get a piece of the brownie. However they were both denied "prequalification status" due to old outstanding warrants (some issue with homes that Sims owns and a traffic ticket for Johnson). They will appeal the decision.
As recreational marijuana becomes legal across the country we will likely see many more former athletes get involved. The article mentions that Martellus Bennet says more than 80% of football players smoke pot to deal with pain.