The Miami Dolphins signed quarterback Tua Tagovailoa to a massive extension last year, and one writer says it is one of the league's worst.

Miami quarterback Tua Tagovailoa is beginning to understand the old football adage that your best ability is your availability. The Dolphins' sixth-year signal-caller has been hampered throughout his run in Miami with a string of injuries.

Tua Tagovailoa's yards per pass and air yards per pass were down big-time last season. What can Miami do about it?