My highest is 100 in grifball, but in a regular match it was 64 on Antifreeze CTF. What’s yours?
I think I got about 40 or so in a match of Grifball once.
100 in grifball also thanks to spawn camping 
75 in…you guessed it…Grifball. Such a great game.
49 in one Grifball match, 6 of them was assassinations and 2 ground pounds. Pretty much finished the commendation there 
I had 26 kills in Team slayer once or maybe it was 23.