The NFL Scouting Combine is a week-long showcase occurring every February at Lucas Oil Stadium (and formerly at the RCA Dome until 2008) in Indianapolis, where college football players perform physical and mental tests in front of National Football League coaches, general managers, and scouts. With increasing interest in the NFL Draft, the scouting combine has grown in scope and significance, allowing personnel directors to evaluate upcoming prospects in a standardized setting. Its origins have evolved from the National, BLESTO, and Quadra Scouting organizations in 1977 to the media event it has become today.
Athletes attend by invitation only. Implications of an athlete's performance during the combine can affect their draft status and salary, and ultimately their career. The draft has popularized the term "workout warrior", whereby an athlete's "draft stock" is increased based on superior measurable qualities such as size, speed, and strength, despite having an average or sub-par college career. The 2018 NFL scouting combine is scheduled for February 27 to March 5. Wikipedia