Philadelphia Eagles offensive tackle Lane Johnson is facing a 10-game suspension for violating the league's policy on performance-enhancing drugs, according to multiple media reports on Tuesday.The reports included one on the National Football League's website.Johnson was previously suspended four games for a doping violation in 2014.Johnson is reportedly appealing the latest penalty, but at the moment the Eagles face the possibility of losing a key member of their offensive line for most of the season.The 26-year-old Johnson, drafted in the first round (fourth overall) of the 2013 NFL Draft out of Oklahoma, signed a five-year, $56.2 million contract extension in the off season that made him the highest-paid right tackle in the NFL.UPDATE - FOX Sports' Jay Glazer reports that Johnson "took an amino acid that was approved but tested positive for peptide. fighting it as well as company. You're responsible for what goes in your body but he insists it was approved. Waiting on B sample." - Matt Burke
