How many players were on the field for Derby County when they achieved their biggest win?

Derby County's biggest win was a 5-0 victory over Hull City in the Championship on August 16, 2015. For this match, the Rams had a total of 18 players on the field - 11 starters and 7 substitutes. The starting line-up included goalkeeper Lee Grant, a back four of Cyrus Christie, Richard Keogh, Jake Buxton and Craig Forsyth, a midfield of Will Hughes, Jeff Hendrick, Craig Bryson and Johnny Russell, and a front three of Chris Martin, Tom Ince and Jamie Ward. The substitutes were Scott Carson, Ryan Shotton, Simon Dawkins, Andreas Weimann, Bradley Johnson, Darren Bent and Jamie Hanson. All in all, the 18 players on the field all contributed to the 5-0 win and helped Derby County achieve one of their biggest wins in recent years.