Not a teacher.
"Ostracize" may be the word you are looking for.
Ostracize | Define Ostracize at Dictionary.com
Student or Learner
I wonder if abandon can describe the act of a coach excluding a player from a team . If yes, is it OK to say: His abandonment by coach Ferguson has made Owen consider leaving Manchester Utd.
Any other alternatives are appreciated.
I just came across an old article which uses omission.
"Zaccheroni played down the omission of star striker Christian Vieri, who was a non-playing substitute."
'Omission' could be a euphemism for ostracising and is used sometimes precisely because it has some ambiguity about the reasons behind the decision.