Tua Tagovailoa wears the Riddell CPK Shoulder Pads. These are a common choice among QB’s because they allow plenty of customization. With these, it seems you can move/take off any pads that you feel are in your way. Of course you’re going to be losing some safety, but sometimes QB’s must prioritize throwing an accurate ball over protection. Tua spins the ball with the best of them and values maximum range of motion and mobility. These pads are low profile to aid in mobility as well.
Tua also wears a Riddell backplate which attaches right to the shoulder pads.
You can checkout the Riddell CPK shoulder pads at Riddell.com for $460 and the backplates here for $40-$80.