noun
1.
the act or instance of making or becoming different.
Madeline Reese was only 15 when the call up to the senior national team came, and would be a lie to say no one expected it.
The USWNT get a some new players filtered in after some retire and some are injured. They won the their third World Cup in 2015 and are out of the olympics this is an eye opener for the team as the new players come in the old ones need to stay strong and keep the team in victory.