The second unit should create a lot of competition in training camp. As it stands now, the expectation would be LT Walker, LG Rivers, C Clark, RG Reed and RT Nelson. Herbert has more experience on the team, but Nelson gets the nod over Herbert who has only played in 12 games in three seasons.
Herbert would become the second-team RT if Nelson winds up taking a redshirt season. The Miami Hurricanes have built depth on the offensive line in the last few classes. The rotation is likely to be primarily some combination of the players already listed. The others will be there to add depth. In college that is critical.
Hillery has played 20 games in the last two seasons, mostly on special teams. He will add depth for Miami at guard and tackle. Creating a three-deep depth chart for Miami would likely have Hillery or Herbert at LT depending on how the season plays out for Nelson. Ousmane Traore would be likely as the third team guard.
Redshirt freshman Adam El-Gammal and incoming freshman Chris Washington who is likely to redshirt and walkons are likely to complete the third-team offensive line for Miami. The rotation on the Hurricanes offensive line is likely to come from the first two teams if Miami stays healthy. Gaynor and Clark are the only two centers.
However the offensive line plays out for Miami in 2020, the Hurricanes need vast improvement for the offense to be more productive. The offensive line was a huge detriment for the Miami football team in 2020. If Miami does not take a big step upfront in 2020, the rest of the offense will be hindered.