Led by quarterback Peyton Manning, the Denver Broncos are expected to compete for a Super Bowl championship this upcoming pro football season. But for their first four games, they’ll be without the services of their outstanding outside linebacker Von Miller, suspended by the NFL for violating the league's substance-abuse policy. 

The Denver Post reported yesterday that in 2011, Miller's sensational rookie season, he tested positive for both marijuana and amphetamine. Cannabis use is legal in the Bronco's home state of Colorado. Regardless, the NFL’s drug policy is the harshest in sports for pot use. However, Miller's amphetamine is a bit more serious. Amphetamine damages the heart and is highly addictive. But players have been known to use it as a performance enhancer, which could taint Miller's fantastic '11 season.

Miller proclaimed his innocence on Twitter: "I know I did nothing wrong. I'm sure this'll be resolved fairly." He’s appealing the suspension with the assistance of the NFL Players Association. The union is concerned that  news of the suspension compromised Miller's confidentiality. The NFLPA also maintains Miller's suspension is not for performance enhancing drugs.