Not having made an appearance in an international sports match.(adjective)
Simple past tense and past participle of uncap.(verb)
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Use "uncapped" in a sentence
"Using a feature called uncapped partitions, you can even exceed the amount of hardware that you configure on your partition, your entitled capacity (EC), which is an important feature in environments where activity fluctuates."
"Telegraph England name uncapped quintet in provisional squad for ICC World Twenty20 - 44 mins ago"
"England manager Martin Johnson has called the uncapped Northampton full-back or scrum-half Ben Foden into his elite squad for the 2009 Six Nations."