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Stat Attack: Zac revs up to the max to cover most metres

Dragons young gun Zac Lomax covered the most ground in round one but he can expect a reduced workload this week after being switched from fullback to wing.

Per Telstra Tracker data, the 20-year-old ran a total of 10.1 kilometres in St George Illawarra's 24-14 loss to Wests Tigers at WIN Stadium.

The competition average for fullbacks in 2019 was 7.7km.

In his first NRL match wearing the No.1 jersey, the talented Lomax handled the physical demands and scored a try but recorded only 55 metres with the ball and made three errors.

A quad injury to winger Mikaele Ravalawa has resulted in Lomax being pushed to the flank for the Dragons' clash against Penrith on Friday, with Matt Dufty returning to the side at fullback.

As usual, it was fullbacks and halves who dominated the top five in the maximum running distance category.

Roosters five-eighth Luke Keary ranked second with 9.3km in a loss to the Panthers, while Lomax's Red V teammate Corey Norman (9.1km) came in next.

New Tricolours halfback Kyle Flanagan (9.1km) worked up a sweat in marshalling the troops alongside Keary while Manly fullback Tom Trbojevic (9km) was busy in his return from a pectoral injury.

The average kilometres per match for halves last season was 7.8.

Other Telstra Tracker data proved Storm winger Josh Addo-Carr is still the game's fastest man, clocking him at a top speed of 35.3km/h in his side's win over the Sea Eagles, however Cowboys flyer Kyle Feldt matched him.

They were followed by Bulldogs hooker Jeremy Marshall-King (34), Roosters flanker Brett Morris (33.5) and Lomax (32.9).

Penrith centre Brent Naden was the king of high-speed efforts - bursts of 20km/h or more - with 34.

Roosters superstar James Tedesco (32), Tom Trbojevic (31), Wests Tigers fullback Corey Thompson (31) and Storm outside back Justin Olam (29) completed the top five.