# This fails
            roster['CMHeight'] = roster['Ht'].str.split("-").str[0].astype(int) * 30.48 + \
                                 roster['Ht'].str.split("-").str[1].astype(int) * 2.54,

            # This works - why?
            roster['feet'] = roster['Ht'].str.split("-").str[0].astype(int)
            roster['inches'] = roster['Ht'].str.split("-").str[1].astype(int)
            roster['cmheight'] = roster['feet'] * 30.48 + roster['inches'] * 2.54