Mark Teixeira walked out of Dr. Melvin Rosenwasser’s office yesterday morning encouraged by what the wrist and hand specialist told him.

“He was very happy with the progress,” Teixeira said of the torn tendon sheath in his right wrist. “I am very happy and feeling good. I wasn’t expecting him to say, ‘This is terrible.’ I am very encouraged, and I am going to stay positive.”

Rosenwasser cleared the Yankees first baseman to remove the brace from his wrist when he isn’t working out, though he did not give him permission to start swinging a bat.

“That’s for the next checkup in about 10 days,’’ Teixeira said.

Teixeira, who will stay with the club until he is ready to play in minor league games, watched yesterday’s 8-2 loss to the Red Sox from the dugout.

“It’s very disappointing, especially Opening Day,’’ Teixeira said of sitting it out. “It’s the first Opening Day I have ever missed. It’s super-disappointing.’’

Kevin Youkilis and Lyle Overbay played first in place of Teixeira. Youkilis, who played the final three innings at third, went 1-for-4 and Overbay was hitless in two at-bats.

***Phil Hughes threw seven innings against Single-A Tampa at the Yankees’ minor league complex in Tampa. Later, after David Phelps, who is slated to start Saturday in Detroit, entered yesterday’s game in the sixth inning, Joe Girardi was asked whether Hughes could make the start against the Tigers instead.

“I really haven’t gotten a report on Hughes, how many pitches he threw,” Girardi said of the right-hander, who is on the DL attempting to build arm strength after suffering a bulging disk in his upper back early in spring training. “I have to see how he did and where we are at with him.’’

Phelps worked 1 1/3 innings, allowing a run, a hit and two walks.

Phelps worked around a leadoff triple by Jacoby Ellsbury in the sixth, but he walked the first two batters in the seventh and watched Boone Logan allow one to score.