Simpson is inactive as the Rams' emergency third quarterback for Thursday's matchup against San Francisco in Melbourne, Australia, Nate Atkins of The Athletic reports.
It thus appears Stetson Bennett has won Los Angeles' No. 2 QB job, at least for the first game of the season. Simpson, who was taken by the Rams in the first round of April's NFL Draft, can make his NFL debut Thursday only if both starter Matthew Stafford and Bennett have to exit due to injury, illness, or ejection.