The phrase "inconsistent player" refers to someone who doesn't perform at the same level or have the same results on a regular basis.
Sentences with «inconsistent player»
Ox is the most inconsistent player in this team. (justarsenal.com)
In my book, he's still a very inconsistent player who goes missing (especially in big games) more times than not. (justarsenal.com)
For how many years have we been talking about waiting for inconsistent players to come good, or stay healthy, or maximize their potential? (justarsenal.com)