The Texas switch-hitter hit a two-run homer -- his first from the right side of the plate in 2005 -- in the sixth inning to give the American League a 7-0 lead. Rangers second baseman Alfonso Soriano, who had entered as a pinch-runner for Vladimir Guerrero, also scored on the play.
Teixeira, making his first appearance in an All-Star Game, has hit all 25 of his American League-leading regular-season home runs from the left side of the plate this year and is batting .290 with 73 RBIs. He has scored 67 runs and has 21 doubles, totalling 102 hits this season.
"I'm getting a lot more at-bats left-handed and I feel a little bit more locked in," Teixeira said. "I need to get comfortable and get a few more at-bats. Tonight, I felt comfortable and hopefully this is the start of some good things coming right-handed."
He started at first base for the American League and finished 1-for-3, hitting seventh in the batting order between Guerrero and Boston catcher Jason Varitek. He grounded out to first base in his first at-bat and flied out to second base in his second at-bat.
He connected on a 3-2 delivery from Florida's Dontrelle Willis with no outs in his third at-bat to secure a lifelong memory a day after a forgettable performance in a contest designed for the long ball.
"I was fouling pitches off and he threw a high fastball," Teixeira said. "I got enough of it."
On Monday, Teixeira was eliminated from the Home Run Derby after hitting two home runs in the first round.
"I wasn't really nervous as I thought it would be," Teixeira said of the Home Run Derby. "I didn't really get locked in and that's the key. It was still a great time. ... It was great to [hit a home run] in a big game like this when it counts."
Soriano, appearing in his fourth All-Star Game, went 0-for-1 with a run scored.
"I love coming here and seeing all of my friends here," Soriano said. "You come here to have fun but also play the game for the fans. This never gets old."
Rangers starting pitcher Kenny Rogers was booed when he was introduced during pregame introductions, and again when he took the mound in the seventh inning. He allowed three hits and two runs -- including a two-run homer by Atlanta's Andruw Jones -- in one inning and was booed on his way to the dugout. The left-hander is scheduled to pitch for the Rangers on Thursday and continues to appeal his 20-game suspension and $50,000 fine for a run-in with two cameramen at Ameriquest Field in Arlington last month.
Rogers did strike out one batter, the Cubs' Derrek Lee.
"I did not want to dwell on what was happening or what was going to happen," Rogers said. "I tried to stay focused."
Young entered in the sixth inning for the American League and went 1-for-1 with a double. He shared the field with Soriano in the eighth.
"It was a blast," Young said. "You always want to do well in this game, but if that does not happen, you move on. I still prepare the way I do for any game, so in that way, it's like a normal game."
Afterward, Young admitted ribbed Teixeira about the long ball.
"I told him it was ball four and he was a better hitter than that," Young said with a smile.
Jesse Sanchez is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.