I think in addition to BC, he's been listed as co-starter at least of couple of times. "Tariq Bracy or Clarence Lewis." If I remember correctly.
Link: https://www.ndinsider.com/football/ahead-of-his-time-freshman-cb-clarence-lewis-is-on-the-rise-for-notre-dame/article_be1e518d-f8ce-5d4e-ae26-bc110a1e7519.html