The Dolphins built around quarterback Tua Tagovailoa and his two speedy wide receivers, but something still seems to be missing.

Tua Tagovailoa suffered another concussion in a career that has been full of them in Week 2. Here's a timeline on the Dolphins QB's head injuries:

The Dolphins’ Tua Tagovailoa wins his second straight weekly title and we have a new (but familiar) No. 1 overall in latest Miami Herald NFL QB Rankings.

Tua Tagovailoa has been a strong starting quarterback at the NFL level, but his cold-weather stats leave a lot to be desired.

Dolphins' Tua Tagovailoa still believes in the team even as their Week 13 loss to the Packers might have dimmed their playoff hopes.

Fans are accusing the Green Bay Packers of purposely trying to injure Miami Dolphins QB Tua Tagovailoa with head hits.

A dichotomy of mentality and physicality is driving the Miami Dolphins, who don't want Tua Tagovailoa to step into unnecessary hits, but are praising his lengthiest stride: a verbal cue pulled from his interest in boats.

It's fair to argue whether Miami Dolphins quarterback Tua Tagovailoa should still be playing this season after suffering his third concussion in three seasons

All those people who wanted Tua to retire after his third concussion suddenly can't stop complimenting the Dolphins quarterback.

During quarterback Tua Tagovailoa’s four-game absence, the Miami Dolphins looked like one of the worst teams in the NFL.

Dolphins’ Tua Tagovailoa wins Week 12 title and blasts into season Top 20 in Miami Herald’s latest NFL QB Rankings. Ravens’ Lamar Jackson ascends to No.1 overall ... but will it last?