Three touchdowns during a red-zone drill against the second-string defense doesn't tell us enough about whether Tannehill has improved on third-down throws, red-zone execution and fourth-down efficiency. Those are all critical moments when quarterbacks win and lose games. They are areas that separate the average quarterback from the good, and good from the elites.
http://www.sun-sentinel.com/sports/miami-dolphins/fl-kelly-miami-dolphins-tannehill-0731-20130730,0,568643.story