[img]www.imgur.com/dYMVI6R.gif[/img]
If you add that into the Signature section of the profiel editor then that´s how. You do need to get your own signature, though, and there are plenty of gamemode signatures. For example, here's your Deathrun signature:
[img]http://fastdl.friendlyplayers.com/siggen/deathrun/76561198190584613.png[/img]