The Washington Wizards finally have regained something they haven’t had in years: momentum. Now, President Ernie Grunfeld must keep it going.

By adding rookie forward Otto Porter Jr. to a roster that already included guards Bradley Beal and John Wall, the Wizards have assembled a talented young nucleus that should lead them back to the playoffs. But for Washington to solidify its position as a playoff team in the Eastern Conference next season, Grunfeld has to strengthen the bench. Backup point guard is the key.

Last season, the Wizards were caught off guard when Wall missed the first 33 games because of a knee injury. The Wizards figured A.J. Price, who started a total of three games during his first three seasons in the league, would be okay playing fewer than 15 minutes per game behind Wall.

Price wound up being in the 30-plus-minute range to start the season, which wasn’t good for the Wizards. During Washington’s 4-28 start, point-guard play was a glaring deficiency. The Wizards also tried Jordan Crawford in the role until he brought back bad memories of knuckleheads past and was shipped to Boston.

When free agency begins Monday — teams can begin negotiating with players but contracts cannot be signed until July 10 — Grunfeld and his staff should go all-in on signing an all-around better backup for Wall. The Wizards should only target free agents who are potentially good enough step in over long stretches for Wall, who missed a lot of time in his first three seasons, but also capable of staying sharp if Wall plays in more than 70 games for the first time in his career. Washington needs a veteran who has produced consistently as a part-time starter and also has made things happen coming off the bench.

The Wizards want Wall to be on the court with Beal, Porter and center Nene — the guys they’re rolling with long-term — as much as possible. Still, the Wizards have to make sure they have a good insurance policy in place in case Wall’s body forces him to take another long break.

Every team wants super subs. Finding those guys, especially while working within the constraints of the league’s salary cap, is the hard part. Considering Wall’s injury history, the fact that the Wizards have assembled enough talent to make a positive move next season and that their long-suffering fans are eager for a new day, the Wizards can’t mess around with whom they put behind Wall.

In any other offseason, the Wizards could dangle the $5 million mid-level exception at the best unrestricted backup point guards. But after what Martell Webster accomplished in his first season with the team, the Wizards might have to put that money aside for the veteran forward.