Funny thing is, he's a "rugby" forward. They're immensely slow in rugby union, but not so in Rugby League.
Having said that, I've watched what we in the UK call "gridiron" or "American Football" on TV. There doesn't appear to be anyone who participates in that sport at the highest level who couldn't cover 50 metres in less than 7 seconds. Heavens, they're FAST, no matter what their size or equipment.