Brady's right shoulder was pressed to the ground by Haynesworth on an incomplete third-down pass late in the first half of Friday night's preseason game.
Brady went to the bench, where he flexed and rotated his arm as the half came to a close. He did not play in the second half, even though most of the first-team offense returned for the first drive of the third quarter.
"Anytime someone 350 pounds falls on him, it's going to hurt him," New England right tackle Matt Light said. "You just know it's part of the game, and Tom's been through it before and you know he can take it."
In the fourth quarter, the Patriots announced Brady's injury as a sore shoulder, a diagnosis that gave coach Bill Belichick a twitch in his both of his shoulders. The Patriots coach was his classic self, displaying the annoyed shrug so familiar when anyone asks him about an injury. Despite the team's announcement, Belichick said Brady had only "some bumps and bruises, just like everybody else who played in the game." He also said that he had not planned for Brady to play any of the second half.
Brady did not speak to reporters after the game.
Brady completed 12 of 19 passes for 150 yards and two touchdowns.
Information from the Associated Press was used in this report