From the info I have gathered on the interwebs Wallace is looking for a place to play in 2017. His Rivals profile (2016) shows him with a UTSA offer. He started 9 games at guard for Cal and played in all 12 games.
As we all know you can never have too many good offensive lineman. This is something that might develop quickly so stay tuned. I have a message out to Wallace hoping to hear back today.