unknowncontender

noun
UK /ʌnˈnəʊn kənˈtɛndə/
US /ʌnˈnoʊn kənˈtɛndər/

A person who competes in a game or contest but is not famous yet.

The unknown contender surprised everyone by winning the race.


OTHER MEANINGS

2. A team that few people have heard of but that is taking part in a competition.

The unknown contender from a small town made it to the finals.

3. Someone trying to win something without being well known.

She entered the contest as an unknown contender and left as a star.

4. A quiet person in a race or match who might still win.

Nobody watched the unknown contender until he crossed the finish line first.