As esteemed philosopher Dwayne ‘‘The Rock’’ Johnson once advised, know your role.
Trevor Siemian does. When the former Northwestern quarterback agreed to a two-year deal with the Bears in March, he knew exactly what he was signing up for: to back up Justin Fields.
Siemian, who has started 29 career games but only five in the last four seasons, ranks second on the depth chart, above Nathan Peterman, whom the Bears signed to a one-year deal this month.
Their goal is the same: to support Fields.
‘‘There’s only one [quarterback] on the field at a time, and there’s not many guys that have done it,’’ Siemian said this week.