Here is how OverKill did in Season 5 of the ComedyCentral series.
Due to previously competing in Season 4.0, OverKill was allowed to skip the preliminary rounds of Season 5.0, where it eventually fought Wrath. The first time that Wrath slammed OverKill into the wall, the adjuster became loose and slipped, causing the drive train to pop out. This rendered it a sitting duck, and OverKill pushed it into a pulverizer, winning by KO and advancing to the round of 16, where it faced BattleRat. OverKill won on a 35-10 judge's decision and advanced to the quarterfinals, where it faced Warhead.
At the start, Warhead failed to land a hit on OverKill to begin with, while OverKill was able to hit Warhead's spinning dome with its blade and push Warhead around using its wedge. This continued for the rest of the match, with OverKill pushing Warhead into the spikestrip and onto the killsaws. Eventually, Warhead's spinning dome stopped working. The fight went to the judges, who ruled 34-11 in favor of OverKill. This win put OverKill to the semifinals, where it faced Voltronic again. After driving over Voltronic's wedge multiple times, the time ran out and Voltronic won on a close 24-21 judge's decision, eliminating OverKill from Season 5.0.