His name is derived from the Green Monster, the nickname of the 37-foot 2-inch wall in left field at Fenway Park.
hɪz nˈeɪm ɪz dᵻɹˈaɪvd fɹʌmðə ɡɹˈiːn mˈɔnstɚ, ðə nˈɪkneɪm ʌvðə θˈɜːɾi sˈɛvənfˈʊt tˈuːˈɪntʃ wˈɔːl ɪn lˈɛft fˈiːld æt fˈɛnweɪ pˈɑːɹk.