Injuries I think have been the problem. He got quite a serious one the other week. Took several minutes to get him off the pitch.
There was a (unused) sub called Sarmiento on the bench for their U18's against Bristol City at the end of Feb although it could just be the same surname:Think I read he had a game for charlton u23's last week
Thanks for clearing up the confusion.A little googling suggests that's a different Sarmiento, not our one.