Match commentators noting that he has been "superhuman" in his distance covered in the early part of the season - apparently among the top in MLS - and last season away in Vancouver he ran 13 km during the match.
Also they were making some point about him making some amount of interceptions, maybe they said he was 14 th highest in the league? Something about match vs Chicago? I was watching other matches and had other commentary running at same time, these two canucks spoke too subdued and I could not mute the other streams in time.
He roams a large amount from wing to wing, and deep also puts in a fair shift pressing/harrassing/tackling, so I can believe him being something special in distance covered in matches.