Yun Suk-Young, Samba Diakite and goalkeeper Alex Smithies were part of a QPR Under-21 team beaten 6-2 by Hull on Friday afternoon.
Midfielders Michael Doughty and Brandon Comley scored for the home side in the match at Rangers’ Harlington training ground, where Tigers striker Greg Luer netted a hat-trick.
Luer gave Hull an early lead following a mistake by Comley, who was then fouled in the penalty area, with Doughty scoring with the resulting spot-kick.
Calaum Jahraldo-Martin restored the visitors’ lead and Luer made it 3-1 shortly before half-time.
The visitors stayed on top in the second half, with Jarrod Bowen scoring before Luer got his third and his team’s fifth goal.
Comley pulled a goal back with a deflected shot before Conor Townsend’s free-kick completed the scoring.
Clubs are able to field a maximum of three outfield players over the age of 21.