Blade runner.

[Big King Sanctaphrax]

Surely that just puts more of the strain on his thighs. Having no legs is hardly an advantage in a sprint competition.

Have you ever run a 400 metre race? Your calves feel like lead during the final 100. That won't be a problem for this fellow. In fact, I believe his second split time is actually better than his first split, which shows you what's going on.

For all we know he'd be slower if he was running with actual legs.