The Celtics’ 15-man roster now features all three of their 2025 draft picks.

Boston is converting rookie guard Max Shulga’s two-way contract to a standard two-year deal, ESPN’s Shams Charania reported late Saturday. He joins first-round draft pick Hugo Gonzalez, who has been a regular contributor for Boston since October, and fellow second-rounder Amari Williams, who had his two-way deal upgraded after the NBA trade deadline last month.

Shulga, drafted 57th overall out of VCU, has logged just seven total minutes for the Celtics this season — all in garbage time — and his promotion won’t change his role. The move was procedural for Boston, which needed to fill two roster spots by Sunday to return to the NBA-mandated minimum of 14 players on standard deals.

The vast majority of Shulga’s professional playing time has come in the G League with the Maine Celtics. He’s appeared in 36 games for Boston’s farm club, averaging 15.7 points, 6.7 assists and 1.6 steals. The 23-year-old has made a respectable 36.7% of his 3-pointers on 6.7 attempts per game, but he’s shooting just 42.0% from the field and 69.3% from the foul line.

“I think Shulga’s had a really good year,” Celtics president of basketball operations Brad Stevens said on Feb. 6.

The Celtics have been walking an end-of-the-roster tightrope since shipping out Josh Minott, Xavier Tillman and Chris Boucher ahead of the trade deadline to dip beneath the NBA’s luxury tax threshold. Since then, they’ve used some creative maneuvering to satisfy the league’s roster rules — which bar teams from going more than 14 consecutive days with fewer than 14 rostered players, or operating below that limit for more than 28 days in a season — without breaching the tax line.

First, Boston signed ex-Celtics guard Dalano Banton and two-way player John Tonje to 10-day contracts. Then, 14 days after those expired, the team converted Shulga’s two-way and reportedly signed veteran big man Charles Bassey — who starred for the Celtics’ Summer League squad last offseason — to a 10-day deal.

The Celtics still have one open 15-man roster spot, which they’ve kept vacant since the start of the season. They could fill it before the playoffs by promoting Ron Harper Jr.,  who’s seen by far the most NBA playing time among Boston’s current two-way players.

That was how the Celtics plugged their final roster opening in each of the last two seasons, converting center Neemias Queta’s two-way contract in 2024 and doing the same with guard JD Davison last year. Harper, who was one of seven G League players selected to the 2026 Rising Stars challenge, has seen action in 13 of Boston’s last 17 games and scored a career-high 22 points in Tuesday’s road loss to San Antonio.

“Ron has worked, and the way he plays in game against San Antonio or OKC is the way he plays in a stay-ready game,” Celtics head coach Joe Mazzulla said before Friday’s 111-100 win over the Washington Wizards. “It’s the way he plays in G League games. It’s the way he plays in practice. He cares about winning, cares about competing. He executes the details very well in all settings, so his ability to think the game and compete is top-notch. He’s getting better and better.”