Sorgi was still gathering information Friday about the tear in the anterior capsule of his throwing arm, but said the injury he sustained in Monday night's win over the Jets is a lot worse than he originally thought.
He is taking anti-inflammatory medicines to reduce the swelling and hopes to be sidelined only two to three weeks, though he's unsure about a timetable for his return.
The Giants open the season against the Carolina Panthers on Sept. 12.
"I don't know what it all entails, how quickly the rehab and the comeback from it is," Sorgi said as the Giants broke training camp at the University at Albany. "It ended up being a lot worse than I thought it was. It ended up being an injury that is not going to get better in one or two days like I thought it would. I'm just playing it by ear."
Sorgi, who was signed in the offseason to back up starter Eli Manning, said he was limited in making over-the-head movements with his right arm. He can make underhand movements without a problem but said his range of motion declines as he lifts his arm.
"I can tell when I lift my arm up, it's hard to hold it out to the side," said Sorgi, who backed up Peyton Manning for six seasons in Indianapolis before signing with the Giants. "Over-the-head movement is just not going to happen now. I just hope it happens sooner than later."
Manning also was hurt in the game, receiving a three-inch gash on the left side of his head when his helmet was knocked off and he was hit by Jets safety Jim Leonhard.
Manning missed the final walkthrough practice on Friday. He went to New York City to have doctors look at the 12 stitches in his head.
Neither Manning nor Sorgi will play Saturday night, when the Giants play the Pittsburgh Steelers in their first home game in their new $1.6 billion stadium.
Friday's attendance for the final practice was 920, pushing the attendance for camp to 39,875, the fifth-highest in the team's 15 years in Albany. The daily average of 2,492 was the second-highest. The Giants practiced 23 times in 16 days in the camp.