Coach Antonio Pierce said Wednesday that O'Connell won't play in Friday's preseason game against the 49ers, Paul Gutierrez of ESPN.com reports.
Neither will Gardner Minshew, who was named the Week 1 starter Sunday. O'Connell will enter the regular season as the Raiders' No. 2 quarterback, after completing 21 of 29 passes for 176 yards, one TD and one INT in two preseason appearances.