The San Diego Padres are nearing a deal to acquire second baseman Luis Arraez from the Miami Marlins for reliever Woo-Suk Go and prospects Dillon Head, Jakob Marsee, and Nathan Martorella, a source told ESPN's Jeff Passan on Friday night.

The trade is pending medical review but is expected to be finalized soon.

The transaction represents the first significant move for the Marlins since Peter Bendix took over as the team's president of baseball operations in November after Kim Ng departed. It marks the beginning of the Marlins' teardown of an underachieving roster that has produced the third-worst record in the majors at 9-25 with a minus-61 run differential after reaching the postseason in 2023.

On the other side, it's another aggressive deal for A.J. Preller, the leader of the Padres' front office since 2014. Arraez, one of the sport's best contact hitters, will give the Padres a needed left-handed-hitting weapon after Juan Soto was sent to the New York Yankees in December. San Diego is 17-18 with a plus-6 run differential.

"It's really amazing -- that guy is a baller," Fernando Tatis Jr. said about Arraez after the Padres' win Friday night. "He's probably the closest to Tony Gwynn right now, so looking forward to seeing him in our lineup. ... The guy's a pure hitter and I can't wait for him to help us."

Arraez, 27, was the Marlins' best player, an All-Star and batting champion each of the last two seasons. This season, he is batting .299 with a .719 OPS in 33 games, all started at second base. He also has extensive experience at first base.

Arraez is expected to start games as the Padres' designated hitter, but the club plans to cycle through the DH spot. Jake Cronenworth, Xander Bogaerts and Manny Machado could also get at-bats there. Bogaerts has been the club's starting second baseman.

Go spent seven seasons in the Korean Baseball Organization (KBO) before signing a two-year deal with a mutual option worth $4.5 million guaranteed during the offseason. The 25-year-old right-hander appeared in 10 games for Double-A San Antonio, posting a 4.38 ERA across 12 innings after failing to make the Padres' bullpen out of spring training.

Head was the Padres' first-round pick (25th overall) last year out of high school. The 19-year-old center fielder is batting .237 with a .683 OPS and three stolen bases in 21 games in low-A.

Martorella is batting .294 with an .282 OPS in 23 games in San Antonio. The Padres selected the 23-year-old first baseman in the fifth round of the 2022 draft. Marsee, a 22-year-old outfielder, has spent the season in San Antonio batting .185 with two home runs. He was a sixth-round pick in 2022 out of Central Michigan.

The Associated Press contributed to this report.