The Nets continued to fine-tune their roster on Sunday, adding free agent Lonnie Walker IV to their mix at shooting guard.

The former Lakers wing agreed to a one-year contract to come to Brooklyn, ESPN reported.

The 6-foot-4 Walker, a first-round pick (18th overall) by the Spurs in 2018, averaged 11.7 points and shot 36.5 percent from 3-point range in 56 games (32 starts) for Los Angeles last season.

Walker missed time during the regular season with a knee injury, but he contributed to the Lakers’ playoff run to the Western Conference Finals, highlighted by a 15-point fourth quarter in a Game 4 victory over the Warriors in the second round.

The signing comes after the Nets’ salary dump of Patty Mills to the Rockets on Saturday.

The veteran guard will be rerouted to Oklahoma City, with the Thunder receiving draft compensation to take on Mills’ $6.8 million expiring contract, according to ESPN.

The Nets had agreed to trade the 14-year veteran to Houston for cap relief after agreeing to a one-year deal with former Knicks point guard Dennis Smith Jr.

The Athletic had reported Saturday that Mills was slated to be included in the Rockets’ sign-and-trade deal with Memphis for free-agent guard Dillon Brooks.

The 34-year-old Mills was the oldest remaining Net and the only player left on the roster with a championship ring, but he played in just 40 games last season with two starts, averaging 6.2 points per appearance.

He had averaged 11.4 points over a team-high 81 games in 2021-22, including a career-best 227 made 3-pointers, the second-most in one season in team history.

The Nets also traded Joe Harris and two future second-round picks to Detroit on Friday for salary cap relief, before re-signing restricted free agent Cam Johnson to a four-year contract worth $108 million.

Seth Curry (Mavericks) and Yuta Watanabe (Suns) have signed elsewhere as free agents.