Red/Maroon

Fearless Gladiator's Dreadplate Shoulders (Horde)
Source: Vendor
Vindictive Gladiator's Dreadplate Shoulders
Conqueror's Spaulders
Source: Quest
Pauldrons of Roaring Flame (Normal)
Source: Firelands
Pauldrons of Roaring Flame, Ashes to Dust
Scimitar of Seven Stars (Heroic)
Source: Heart of Fear
Scimitar of Seven Stars (LFR)
Source: Heart of Fear
Taner's Terrible Spine (Mythic)
Source: Blackrock Foundry
Taner's Terrible Spine (Heroic)
Source: Blackrock Foundry
Voror, Gleaming Blade of the Stalwart (Mythic)
Source: Uldir
Tyrannical Gladiator's Shield Wall (Horde)
Source: Vendor
Steelskin, Qiang's Impervious Shield (Heroic)
Source: Mogu'shan Vaults
Deadly Gladiator's Shield Wall
Source: Vendor
Wild Gladiator's Shield Wall (Horde)
Source: Vendor
Warmongering Gladiator's Shield Wall
Fang of the Earth (Mythic)
Source: Blackrock Foundry
Gridrunner Galea (Normal)
Source: Uldir
Helm of the Defiled Laboratorium, Petrified Mask of the Afterlife
Cruel Gladiator's Dreadplate Helm (Elite)
Source: Vendor
Ferocious Gladiator's Dreadplate Helm
Cruel Gladiator's Dreadplate Helm (Alliance)
Source: Vendor
Ferocious Gladiator's Dreadplate Helm
Soulwarped Tower Shield (Normal)
Source: Hellfire Citadel
Furen's Favor
Source: Quest
Pulsing Spellshield
Source: Ulduar
Bloodseeker's Bulwark
Source: Legion Invasion