Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
right-hander is a noun meaning "(baseball) a pitcher who throws with the right hand". It carries 2 recorded senses.
(baseball) a pitcher who throws with the right hand
baseball
a person who uses the right hand more skillfully than the left
Definitions, synonyms and semantic relations for right-hander come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.