Defensive Lineman have probably the most physically demanding position on the field. They must be big and strong enough to stop the run as well as agile and fast enough to rush the passer.  You’ll often hear the expression that the best defensive linemen have a ‘great motor,’ in other words, they are physically fit, mean, nasty, and relentless! They must also understand their roll within a defensive scheme as it often calls for protecting a gap and taking on two offensive lineman in order to free up a linebacker to make a play. 

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At the youth and High School levels, place kickers are often the overlooked position until it comes down to the final seconds where a game can be won with a field goal. Arguably this is one of the most difficult positions since a kicker must perform under pressure