Steve Young played between 1987 and 1999 with which side?

I used to go watch him practice when he played for the L.A. Express of the USFL prior to his time playing for SF. The express practiced on the same field my club soccer team had used for practices and our "home" matches, La Marina school in Manhattan Beach, CA. Their home games were played at the L.A. Coliseum.

Steve Young was a great quarterback!