Five years in age and $4 million separated DJ LeMahieu and Jed Lowrie.

The younger LeMahieu got more money to come to The Bronx. The elder Lowrie has yet to earn any of his.

The two free-agent infield acquisitions were both considered strong additions. But so far, with the Subway Series set to begin on Monday at Yankee Stadium, LeMahieu has been the equivalent of a grand slam, and Lowrie has yet to even register, one factor in the Yankees sitting atop first place in the AL East and the Mets fighting to remain relevant.

While the 35-year-old Lowrie remains in limbo, rehabilitating in Port St. Lucie, Fla., LeMahieu has been a rock for the Yankees. Both were given two-year contracts, though the 30-year-old LeMahieu received $4 million more.

Lowrie couldn’t make it through the first week of spring training workouts before being shut down with soreness in the back of his left knee, then strained his hamstring during a rehabilitation assignment three weeks ago. LeMahieu, the former Rockies’ infielder, has been a Yankee staple.

Lowrie, some argued, was the bigger addition. He was coming off an All-Star season in which he played in 157 games — 29 more than LeMahieu appeared in — and hit a career-high 23 home runs. But the versatile LeMahieu, who was 2-for-6 Sunday with an RBI single in the Yankees’ win in Cleveland, is the one who has performed like an All-Star. He’s one of the few Yankees who hasn’t spent an extended period of time on the injured list, keying their impressive season despite an avalanche of injuries.

“I feel like he’s doing the exact same thing over there as he was with us,” long-time Rockies teammate Charlie Blackmon said. “Maybe the one thing I’m surprised about is that he jumped league to league — totally different personnel, different pitching, slightly different style of game — and managed to play his game right away instead of having an adjustment period.”

The two-time All-Star and three-time Gold Glove winner has been clutch, consistent and just as valuable with his bat as his glove. He’s hitting a remarkable .490 (27-for-55) with runners in scoring position, has posted a robust .321/.368/.472 slash line with an .835 OPS and has committed just three errors despite rotating between second base, third base and even first on occasion.

“Unfortunately, he had to go to New York for people to really take notice,” Blackmon said.

The pressure of New York City and the Yankees hasn’t seemed to bother LeMahieu. If anything, he has thrived under more scrutiny and attention.

“DJ is just focused on winning, helping the team win any way possible,” said Nolan Arenado, another Rockies star and close friend said. “He doesn’t get caught up in where he’s playing, the media. He’s the most level-headed player I’ve ever played with, the most level-headed person I’ve ever met.

“I’m really not surprised he’s doing what he’s doing.”

The Mets, meanwhile, are still waiting to see what kind of player they have in Lowrie.