CHICAGO — If anybody needed an indicator of Seiya Suzuki‘s comfort level in Year 4 with the Cubs, they got it during the team’s mid-May homestand.

Before the Cubs’ series finale with the Miami Marlins, Suzuki was seen warming up in the Wrigley Field outfield showing off his quads.

“Well, you know, I’m wearing a jersey all the time, so I feel like some people thought I had skinny legs,” Suzuki joked through interpreter Edwin Stanberry. “So, I was like, OK, I’m going to show off my legs.”

He also has flashed his sense of humor in a budding bromance with Cubs breakout superstar Pete Crow-Armstrong.

Suzuki has carried that comfort onto the field, enjoying far and away his best season as a Cub yet.

Suzuki and Crow-Armstrong lead the NL in RBI — with 51 and 50, respectively — and they just became the first pair of Cubs teammates in franchise history to each notch 50 RBI in the first 56 games of the season.

[MORE: Pete Crow-Armstrong’s power surge doesn’t surprise Cubs teammates]

The 30-year-old Suzuki just earned the NL Player of the Week honor, and he already has crushed 14 homers in 52 games. He hit a career-high 21 longballs in 132 games last season.

His exit velocity also is at a career-high 93.0 mph, up from 91.7 mph last season. He’s hitting line drives at the best rate of his career, his ground ball percentage is at an all-time low, and he’s generally just ripping the ball all over the field.

“We’ve always talked about a guy that hits the ball that hard should hit more home runs,” Cubs president of baseball operations Jed Hoyer said. “It feels like he didn’t hit quite as many home runs as we probably thought. The ball has been going out of the ballpark this year.”

So what’s behind the success with Suzuki? Why is he putting it all together now?

“He’s been a bit more aggressive, both in counts but also how he’s swinging,” Hoyer said. “He’s looking to do damage, which I think is fantastic. He’s taken advantage of a lot of opportunities. He has a lot of guys on base in front of him, and he’s been really good in those situations.

“His ability to hit … premium velocity has been really important. So, I just think he’s more aggressive, both in demeanor and also in counts. He was a little bit more passive at the plate before, and he’s got guys on base and he’s looking to do damage, and he has.”

The lineup around Suzuki is an important factor, too. He has settled into the No. 3 spot — right behind Kyle Tucker and just ahead of Crow-Armstrong.

“I’m a player who doesn’t really feel too much pressure, but it does help having those guys around,” Suzuki said through Stanberry. “I think it makes the lineup longer. It gives it a little more stability.”

Tucker has posted a .388 on-base percentage this season, and Ian Happ — who has led off for most of the year — has a .347 OBP.

The bottom of the Cubs order also has performed at a high level this season — No. 8 hitters have a .390 season OBP, and No. 9 hitters are at .323 this season — which has contributed to a ton of teammates on base when Suzuki comes up to the plate.

In fact, Suzuki has seen the most opportunities with runners on base of any hitter in MLB. So, it’s no wonder he is on pace for 148 RBI.

“I think as much as anything, this is a talented player getting to a real sweet spot of experience and talent,” Cubs manager Craig Counsell said. “And then I think hitting in a lineup where there’s a lot of action around you, a lot of baserunners and a lot of other attention, matchups — all that spells good things for each hitter.”