EARTH CITY, Mo. — Trying to add some finality to a fluent and fickle situation, St. Louis Rams coach Jeff Fisher said Wednesday that second-year upstart Austin Davis will be the starting quarterback for the rest of the season.

Davis was at first thought to be a stand-in for 13th-year veteran Shaun Hill, who injured his quad while trying to stand in himself for the team’s original designated starter Sam Bradford, who was knocked out for the year with a knee injury.

The situation was considered so tenuous that the team even signed Case Keenum, formerly of Houston, for insurance. Questions about the starting quarterback increased as Hill became healthy and is listed as probable this week at Philadelphia.

So Fisher made the call.

“Davis is the starter for the rest of the season,” Fisher said. “And I told him in a meeting, ‘I don’t want you to be looking over your shoulder.'”

Fisher said he made up his mind during a Week 3 loss to the Dallas Cowboys when Davis completed 30 of 42 passes for 327 yards and three touchdowns.

Although many gave up on the Rams’ offense after Bradford and then Hill were hurt, Davis obviously showed he knows how to keep the team moving. Overall this year he has completed 68 of 94 passes for 754 yards, with three touchdowns and three interceptions. That puts him on pace to throw for more than 4,000 yards on the season

While the offense is still a work in progress, Davis shows the ability to spread the ball around. The Rams are ninth in the league in yards per game (368.3), ninth in passing yards (264.3 per game) and sixth in time of possession (32:12).