ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti fˈaɪv, dˈʊɹɹɪŋ ɡˈeɪm θɹˈiː ʌvðə nˈaɪntiːnhˈʌndɹɪd sˈɛvənti fˈaɪv stˈænli kˈʌp fˈaɪnəlz ɐɡˈɛnst ðə fɪlɐdˈɛlfiə flˈaɪɚz æt ðə məmˈoːɹɪəl ˌɔːdɪtˈoːɹiəm, lˈɔːɹɛnts ˈɜːnd ðə nˈɪkneɪm "bˈætmæn" wˌɛn hiː swˈɑːɾᵻd ɐ bˈæt ˌaʊɾəv mˈɪdˈɛɹ wɪð hɪz stˈɪk.
In 1975, during game three of the 1975 Stanley Cup Finals against the Philadelphia Flyers at the Memorial Auditorium, Lorentz earned the nickname "Batman" when he swatted a bat out of mid-air with his stick.