Jadeveon Clowney, who is having a breakout season for the Houston Texans, is a very good football player. He's also a flexible one.
He can line up anywhere and wreak havoc for opposing offenses. Per Pro Football Focus tracking, Clowney has lined up for at least 50 plays at right defensive end, right defensive tackle, left defensive tackle, right outside linebacker, left outside linebacker, LEO (hybrid end/linebacker on the left side of the field) and REO (same thing on the right). See? Flexible.
Off the field ... Clowney is not quite as flexible.