Man every team does this. Have you seen the CL squads for Bayern, Madrid, Barca etc? You know, elite clubs with the likes of Abner, Lucas Vazquez, Denis Cheryshev, Marcos Llorente , Jan Kirchhoff....Bayen named 4 keepers and half a dozen 18 year olds; Barca have picked 6 players from their B team...
I mean of course we are the only top club in the CL who doesn't have 25 proven first team starters...provided you ignore all the other top clubs.
Off the top of my head I remember the likes of Dong, Eagles, Richardson, Simpson not only being named in our 25 man squad the last time we won the CL, but actually traveling to some of the games.