Six weeks following his release by the Ravens, veteran offensive tackle Eugene Monroe has decided to retire from the NFL after just seven years in the league. Monroe has taken a stance in favor of medical marijuana in the last year.
Eleven NFL players are either currently suspended or will be suspended for the start of the 2016 season. In the NBA, guard O.J. Mayo (two years) and forward Mitch McGary (five games) have been banned. All ran afoul of the leagues' drug-use policies.
Martavis Bryant has been banned for a year by the NFL due to another violation of the league's substance abuse policy. The Pittsburgh wideout sat out the first four games of the 2015 season after he failed several drug tests for marijuana.
Maria Sharapova doesn't deny she'd been taking meldonium since 2006, but claims to have become confused when the World Anti-Doping Agency recently added it to their list of banned drugs.
"The last thing I want to do is fail another drug test and be out of the league," Randy Gregory said last May when he failed a drug test for marijuana at the NFL Combine. The second-year linebacker failed three more tests in 2015 and has been suspended for four games at the start of the 2016 season.