By Aaron Tallent Here are five things to know about the NFL Scouting Combine, the league’s annual draft-related showcase event. Talent evaluation in the NFL has gone from individual player workouts on college campuses to a nationally televised event in a stadium. I am talking, of course, about the NFL Scouting Combine, which is taking place March 1-7 at Lucas Oil Stadium in Indianapolis. Here are five things you need to know about the event also known as the “Underwear Olympics.” 1. Teams evaluated talent individually before the CombineThe first Combine was not held until 1982 and before then,…