The acquisition of English language phonology has been found to be one of the most challenging skills to obtain by non-native English learners. Most L2 speakers are expected to have a foreign accent, especially if they do not begin learning the target language before the cut- off age. This accounts for the rationality behind the thought that L2 learners are prevented from acquiring and producing new sounds with a native-like competence. However, it has also been suggested that it is possible for learners, as they become more conversant with the target language, to improve in their production abilities. This work assessed the performances of some selected Yoruba speakers of English when perceiving and producing the English vowel Schwa. The L2 speakers were influenced by the orthography of the words; therefore they perceived and produced the English 'Schwas' as instances of their native vowels. The study consequently investigated the effects of pronunciation training on their perceptions and productions.