After the twenty home runs hit in four games at the new Yankee Stadium the engineers began the research as to how the winds played a role at the newest launching pad in Major League Baseball. The Yankees made it 21 in five games Tuesday night taking the first game of a rain shortened three- game series over the Oakland Athletics 5-3..Johnny Damon, playing in his 2000th career game hit his second home run of the young season in the sixth inning, a solo shot once again to right field which has become a familiar place for the home run ball in the new ballpark. The run increased the Yankees lead to 5-2.Yankees starting pitcher Andy Pettitte was staked to an early lead in the second inning as the team scored four runs off Oakland starting pitcher Dana Eveland who got the loss, his first of the season.The game also marked the return of former Yankee Jason Giambi to the Bronx. Giambi, batting third, received a standing ovation when he came to bat in the first inning. And if it weren’t for a spectacular running catch by Brett Gardner, Giambi would have had his first extra base hit at the new Yankee Stadium.More importantly it was the good pitching of Pettitte that provided a well deserved rest for the bullpen. Manager Joe Girardi went to the pen twice using Brian Bruney and Mariano Rivera in the ninth who got his fourth save of the season,“Andy understands what it takes to pitch on the mound at Yankee Stadium,” said Girardi. “He grinds it out, gave us seven strong innings.”  Pettitte threw seven strong innings in his third start of the season. He gave up nine hits and two runs, allowing no walks and failed to strike out a batter.Brian Bruney came in for Pettitte and in the eighth inning allowed a run on an RBI single from Jack Cust. The hit was the first hit off Bruney in 22 innings dating back to last season.“You realize the ball is flying out,” said Pettitte about the influx of home runs that have been hit, “but the best thing to do is block it out.” Pettitte added, “George (catcher Jorge Posada) called a good game, mixed it up for me and Gardner made that good play and I adjusted the fastball.”The Yankees won their first ever night game at the new Stadium, and third of their last four. “We have played some pretty tough games and been able to bounce back,” said Girardi no doubt referring to the 22-4 loss at the hands of Indians this past Saturday.Pettitte, who owns the most April wins in franchise history, marked his first start without a strikeout since September of 2007 at Baltimore. And Rivera recorded his 57th save of a Pettitte victory, tying Oakland’s Dennis Eckersley and Bob Welch for the all-time lead in win-save combinations since the save became an official statistic in 1969.Said Girardi about the record, “It’s a lot of longevity the way they take care of themselves.”   The Yankees conclude their first home stand of the season Wednesday afternoon closing the series with Oakland before heading on the road that will take them Boston and Detroit.CC Sabathia (1-1) will make his fourth start of the season opposing (0-2) lefty Brett Anderson at 1:05pm.