- “Sniper...3rd floor to the left.”— Butkus informing Jones of the position of a Jackal sniper after nearly being hit.
Battle of Earth
During the Battle of Earth, his squad was dispatched from the UNSC In Amber Clad to relieve the ground forces. Their Pelican was shot down over Old Mombasa by a Scarab. He survived the crash, but his squad was soon attacked by a Covenant patrol. He was nearly killed by a Jackal Sniper but the sniper just missed him. A Sangheili then tried to sneak up on him with an Energy sword but Butkus' rifle was instead destroyed and he himself narrowly dodged the attack and fell to the ground; picking up a plasma pistol and charging it. As the Elite took Jones hostage, Butkus was able to take down the Elite's shields and allowing Gunnery Sergeant Marcus Stacker to kill the Elite instantly with a single burst of a Battle Rifle, saving his squadmate. His squad later joined John-117 and helped him to chase down and destroy the Scarab.
- Butkus is named after the Bungie employee John Butkus, who worked on the animations and cinematics for Halo 2.
- Butkus used a captured Plasma Pistol to take down an Elite's shields, followed by a Battle Rifle burst from Stacker. This is commonly referred to as the "Noob Combo."