Even though it is now legal to smoke marijuana in Colorado, a Denver Broncos linebacker is facing a four-game suspension for allegedly testing positive for marijuana. Under the NFL’s substance abuse policy, players can face suspension and fines of thousands of dollars for using illegal drugs, including marijuana. [caption id="attachment_6798" align="alignright" width="178"] Von Miller[/caption] Von Miller, who was the No. 2 overall pick in the 2011 draft and is considered by some the Broncos’ best…