The phrase "surprise contender" refers to someone or something that unexpectedly emerges as a strong competitor or participant in a competition or event. Full definition
The journey from surprise contender to completely normal postseason team is a long one, and it's fraught with danger. (sbnation.com)
This comes up now because the Orioles just might be the most surprising contenders in baseball. (sbnation.com)
Manchester United forward Javier Hernandez looks set to leave the club before the transfer window slams shut on Monday evening, with Italian journalist Gianluca Di Marzio now reporting that European champions Real Madrid have emerged as surprise contenders for the Mexican's signature. (caughtoffside.com)