5 Colts, including Jonathan Taylor, wear ‘Guardian Caps’ to protect against concussions IndyStarJonathan Taylor among Colts players to wear Guardian Caps in Sunday’s preseason game NFL.comJonathan Taylor wearing a guardian cap during Colts first preseason game produces mixed reactions Stampede BlueJonathan Taylor among the few NFL players to wear the ‘guardian cap’ on his helmet Yahoo SportsTaylor wearing Guardian Cap in preseason NBC Sports