Which NFL QB sleepers are the most underrated?

It's the second straight year that the NFL's top sleepers have been undervalued.The following players are all top-five picks in the ESPN Insider NFL draft expert sleeper rankings: Eli Manning, QB, New York Giants • Cam Newton, QB , Carolina Panthers • Jared Goff, QB (Los Angeles Rams), Los Angeles Rams • Ryan Tannehill, QB | Tennessee Titans • Marcus Mariota, QB ____The next-highest-rated...