St. Louis Rams quarterback Sam Bradford is out for the season with a torn ACL in his left knee, coach Jeff Fisher confirmed Sunday.

An MRI disclosed he tore the ACL in Saturday night's preseason game against the Cleveland Browns.

"(This is) devastating for Sam," Fisher said. "Anyone that's gone through that procedure and the rehab understands and to have it happen again within the calendar year is very, very difficult.

"We're thinking of Sam. I met with him this morning. He's left the building to spend time with his parents. I really can't give you any timetable as to when he's going to have this procedure done."

Initially, no damage was detected to the same knee that underwent surgery for a torn ACL suffered last season against Carolina on Oct. 20, 2013.

Bradford was hurt with 8:19 left in the opening quarter when Browns defensive lineman Armonty Bryant contacted the quarterback after he released a pass.

After Bradford fell to the turf Saturday, Rams medical personnel and trainers hurried onto the field and then helped him to the locker room. Fisher also came on the field to check on Bradford's condition before Bradford limped off favoring the knee.

Bradford, the No. 1 overall pick in the 2010 NFL Draft, completed 4 of 9 passes for 77 yards. Veteran Shaun Hill replaced Bradford, going 2 of 6 for 45 yards.

"It's just highly unusual," Fisher said of the injury. "There's a one in 100 chance that something like that would happen. It wasn't a high impact; ACL injuries they are all different. This was just kind of a hyperextension with the impact coming from the outside. The knee was locked and something has to give. Unfortunately the ACL gave.

"This team is going to rally around Shaun, and this team is going to go play," Fisher said. "We have all the confidence in the world in Shaun.

"It makes no sense to jump and react right now and try to fill the hole, whatever it costs. We're going to take our time and evaluate this. There's going to be some quarterbacks that are getting released and there may or may not be some quarterbacks that have trade value. We just don't know. It's way too soon."

The Rams stated all offseason their commitment to Bradford. Given opportunities to pursue other quarterbacks, including via the draft, St. Louis turned away and instead invested in Bradford's supporting cast.

Twice in the first round of the 2014 draft, the Rams had a chance to select a quarterback of their choice. Blake Bortles went third overall, one pick after St. Louis drafted offensive guard Greg Robinson. And with a second pick in that round, the Rams went with defensive tackle Aaron Donald while Louisville's Teddy Bridgewater and Texas A&M's Johnny Manziel were available.