The St. Louis Rams and star defensive end Chris Long have agreed to a "massive" four-year contract extension, according to Jay Glazer of FOX Sports. The deal comes after a breakout season in 2011 for the player drafted second overall in the 2008 draft.
Terms of the deal haven't been disclosed yet, but Long will presumably become one of the highest paid defensive players in the league. After showing steady improvement during his first three years in the league, Long emerged as an elite pass-rusher last season, recording 13 sacks with St. Louis.
Beyond the major improvement that Long has made since entering the league, it's worth noting that the Rams have locked up a very durable player for the next four years. Over his first four seasons in the NFL, Long didn't miss a single game.