oddball kills are always one hit except on Ranked Team Doubles.
Team Oddball (13.8%) - Hold the oddball for points. First team to 150 points wins. Players spawn with Assault Rifles. Ball Carrier Traits: 75% walking speed, 50% damage. 10 minute match time limit.
The 50% damage is referring to the oddball, making it a two hit kill on that specific playlist. All other mentions of oddball do not state damage stats as it is a one hit kill (i.e. Lone Wolves, Multi-Team, DLC FFA, etc.)