There was no number 13 on the back of the gray throwback jersey to identify who was wearing it. There was no mistaking the swing.
It was the home run swing of Alex Rodriguez.
The New York Yankees slugger cleared the fences for the 631st time, passing former teammate Ken Griffey Jr. to take over fifth place on the career list. A-Rod helped beat the Boston Red Sox, 6-2, Friday and spoil the celebration on the 100th anniversary of their first game at Fenway Park.
"It was a very cool ceremony," Rodriguez said about the pregame introductions of about 200 former Red Sox players, managers and coaches. "They put on a great show, but the game was good, too."
It was for the Yankees.
In addition to A-Rod's homer, Eric Chavez hit two and Nick Swisher and Russell Martin connected once each one day after Curtis Granderson hit three of the Yankees' four homers in a 7-6 win over the Minnesota Twins -- and exactly 100 years after the Red Sox beat the Yankees' forerunner, the New York Highlanders, 7-6 in 11 innings.
"You're going to hit home runs every once in a while," Derek Jeter said, "but we can't sit around and wait for it."
Jeter also moved up a rung in the record books with his 3,111th hit. He went 1 for 5 and passed childhood idol Dave Winfield for 18th place.
Ivan Nova (3-0) won his 15th consecutive regular-season decision, allowing two runs on seven hits with no walks and five strikeouts in six innings.
"He's a monster. I don't know when people are going to realize that he's a fantastic young pitcher," Rodriguez said. "All he knows how to do is win."
Clay Buchholz (1-1) allowed all five homers in losing for the first time in 12 starts, although he went on the disabled list to stay last June 19 with a lower back strain.
"He's still building," Boston manager Bobby Valentine said. "He's still getting his feet underneath him."
Josh Beckett also served up five homers in the Red Sox second game of the year, a 10-0 loss at Detroit.
Both teams wore throwback uniforms similar to those used in Fenway's first major league game. The Red Sox had off-white uniforms and caps, with the only printing on either being the words "Red Sox" in red across the chest. The Yankees uniforms were all gray with the only printing the letters "NY" on the caps and left breast. It is believed to be the first time the Yankees have worn throwbacks.
The Red Sox lost their fourth straight game, a span in which they've been outscored, 31-8.
"We're a good team. We're just not playing good baseball," Adrian Gonzalez said. "It's frustrating the way we're losing."
Some outstanding players took the field for the Red Sox. Unfortunately, most of them were among the about 200 retirees who strolled to their positions during pregame ceremonies marking the anniversary. They included Hall of Famers Carl Yastrzemski, Carlton Fisk, Jim Rice, Bobby Doerr and Dennis Eckersley plus Pedro Martinez, Luis Tiant, Nomar Garciaparra, Mo Vaughn and Johnny Pesky.
Terry Francona, let go as manager after last year's September collapse that cost the Red Sox a playoff berth, received one of the loudest ovations. Valentine has been booed several times by the home crowd as the Red Sox (4-9) have gotten off to another slow start after opening last season 2-10.
Buchholz allowed six runs on nine hits and two walks.