There are some key tips for marking the disc, that most experienced players know: be on your toes, arms out, watch the thrower's navel or body language, learn their fakes, etc.
But there is another I never hear mentioned: keep your arms back. By this I mean, don't wrap. Ah, those Queenslanders need to practise this.
If you do wrap your arms around the thrower, they will throw under your arms or draw a foul easily.
Let's see how these markers are doing: