Kalvin Phillips is in danger of falling out to the periphery of the squad, and Leeds United cannot afford to allow that to happen.
Leeds United fans have been voting on which young player has excited them the most so far this season.
The midfielder was sent off during the 4-3 loss against Sheffield United.
Alex Mowatt has joined Barnsley from Championship rivals Leeds United.
The emergence of Kalvin Phillips and Ronaldo Vieira has certainly eased the pain of Cook's absence.
The New Zealand striker felt sorry for his young team-mate.
The young Leeds midfield duo have been making waves this season.
Leeds United duo Kalvin Phillips and Ronaldo Vieira played against Liverpool in the EFL Cup on Tuesday evening.
The Millers midfielder is recovering after a strong tackle from Kalvin Phillips.
Leeds have made a bright start to the season, and there appears to be plenty of optimism around Elland Road.