Another trade deadline domino has fallen, this time involving the contending Dodgers, the selling White Sox and a former mid-season acquisition for the Yankees in 2018.

The Dodgers acquired pitcher — and ex-Yankees starter — Lance Lynn and reliever Joe Kelly on Friday, according to The Post’s Joel Sherman, with ESPN reporting that pitcher Nick Nastrini, pitcher Jordan Leasure and outfielder Trayce Thompson will head back to the White Sox.

This marks the Dodgers’ third trade as the deadline nears, with the team also involved in deals that brought utility player Kiké Hernandez and shortstop Amed Rosario to the NL West leaders.

Lynn and Kelly — at ages 36 and 35, respectively — both emerged as trade deadline targets given their contract situations that included club options for 2024.

Earlier in the week, a report from USA Today suggested that the White Sox and Rays were engaged in conversations about Lynn, and when the focus shifted to the Dodgers, Lynn needed to waive his no-trade clause since Los Angeles was reportedly one of the destinations he could veto.

Through 21 starts this season, Lynn has compiled a 6-9 record with a 6.47 ERA, while Joe Kelly’s ERA sits at 4.97 through 31 relief appearances.

Kelly pitched for the Dodgers from 2019-21, and he was part of the 2020 team — along with Hernandez — that won the World Series in MLB’s shortened season.

Teams have until Aug. 1 at 6 p.m. to make trades, and the Mets also completed their first deal as a seller Thursday night by sending David Robertson to the Marlins in exchange for two prospects.