MIAMI -- It didn't take the Chicago Cubs long to make an impact on Thursday. In fact, it took only one pitch.

Cubs leadoff man Ian Happ hit a home run on the first pitch that came his way on Opening Day, off the Miami Marlins' Jose Urena. New owner Derek Jeter watched his Marlins fall instantly behind from his seat two rows behind the Miami dugout.

The Cubs won 8-4 despite a rocky start by Jon Lester. Lester, making his seventh Opening Day start, lasted 3 1/3 innings and allowed four runs, three earned.

Happ, 23, drove Urena's 95 mph fastball out to right field.

"I was thinking fastball first pitch there," Happ said after the game. "Historically I've seen him pretty well the last couple of times I've faced him. He got me a couple times after that, but I saw that one well."

Dwight Evans of the Boston Red Sox homered on the first pitch of the 1986 season, off Detroit's Jack Morris at Tiger Stadium.

Happ has apparently picked up where he left off in spring training -- he hit seven home runs in that time, five leading off games for the Cubs.

He's the third-youngest Cub in the live-ball era to hit an Opening Day home run. Happ's homer was part of a three-run first inning for the Cubs, as Urena hit three batters and walked in a run as well. The Cubs sent nine men to the plate in the inning.

The Associated Press contributed to this story.