INDIANAPOLIS (Aug. 21, 2006) -- Jim Sorgi 's shoulder injury may force the Indianapolis Colts to bring in a new backup quarterback.

Coach Tony Dungy said the team was still awaiting results from Sorgi's MRI before deciding whether to sign another backup quarterback.

"If it looks like he's going to miss some time and some practices, then it's something we might have to think about," Dungy said. "We'll probably know a little more tonight."

Sorgi was expected to back up two-time MVP Peyton Manning for the third straight season, but he came into training camp with a sore throwing shoulder and was hit hard in each of the Colts' first two preseason games.

In the loss against Seattle, Sorgi entered the game midway through the second quarter and lasted only three plays -- a handoff to Joseph Addai, an incomplete pass intended for Aaron Moorehead and a pass that was intercepted by Michael Green and run back for a touchdown.

Sorgi winced and grabbed at his shoulder after getting hit on his first pass attempt, then left the game after trying to throw the ball away on the next play. He twisted awkwardly as he threw the ball and was driven into the ground by linebacker Julian Peterson as the ball fluttered toward the sideline where Green made an easy catch.

Dungy said he fell on the same right shoulder that the Colts had been closely monitoring during training camp, which ended Aug. 19.

"I'm obviously concerned," Manning said after the Colts 30-17 loss. "You could tell by his face that he was in a lot of pain. I'm very concerned for him."

Sorgi was not available for interviews after the game and Colts players had an off day Aug. 21 before they begin preparations for this the contest against New Orleans in Jackson, Miss.

If Sorgi can't play, Shaun King, a seven-year NFL veteran, would likely inherit the backup job. King replaced Sorgi and finished the game 14 of 22 for 146 yards with one sack.

But King, who signed with the Colts in June and is still learning the Colts' complicated offense, insists he'll be ready for whatever Indy asks of him.

"I've been in every situation," he said. "My first year, I was the third quarterback and by Week 9 or Week 11, I was the starter. So I know I have to be ready all the time."

The Colts have two other quarterbacks on the roster -- Josh Betts and Mike McGann -- but both are undrafted rookies.