Lakers’ Walker Kessler makes immediate impact by being ‘relentless’

LAS VEGAS — Lakers coach JJ Redick’s challenge for Walker Kessler is simple: Be “relentless”.Relentless with his motor on both ends of the floor. With his running and changing ends in between possessions. With his screening and rolling towards the rim. With his rebounding.The Lakers got that in abundance during their marquee acquisition’s preseason debut, which came in a 101-89 loss to the Warriors on Tuesday night at T-Mobile Arena in the team’s penultimate e