Road to Duke
Before he was a basketball player, Mason Gillis was a baseball player. Good enough to compete in the Little League World Series. Good enough that choosing basketball over baseball was a genuine sacrifice, not a formality. He grew up in New Castle, Indiana — a town of 18,000 people in Henry County, about fifty miles east of Indianapolis, where the high school gym is called the Fieldhouse and holds 9,325 seats because this is Indiana and basketball is religion.
Gillis was born on November 24, 2000. His parents are Tammy McCall and Bill Gillis. His older sister Lauryn played volleyball at USC before transferring to Wisconsin. The family was built for competition. At New Castle High School, Gillis was a four-star recruit who averaged 21.6 points, 12.2 rebounds, and 2.3 assists per game as a junior, shooting 59.5% from the field and over 45% from three while leading the Trojans to a Class 3A Regional title. He was one of the best two-sport athletes in the state — and then he chose one sport.
In June 2018, Gillis committed to Purdue. The Boilermakers were building something under Matt Painter, and Gillis wanted to be part of it. But a knee injury during his senior year of high school forced him to redshirt his freshman season at Purdue, sitting out the entire 2019-20 campaign. He watched. He rehabbed. And when he finally got on the court, he didn't leave for four years.
At Purdue, Gillis appeared in 132 career games with 63 starts, averaging more than 20 minutes per contest every season. He amassed 827 points, 548 rebounds, and 179 assists. He shot 40.7% from three-point range across four seasons — seventh on Purdue's all-time list. On February 1, 2023, he broke the Mackey Arena record with nine three-pointers in a game against Penn State. He was named Big Ten Sixth Man of the Year in 2023-24 after averaging 6.5 points and shooting 46.8% from deep — sixth nationally among players with at least 50 made threes. He earned his bachelor's degree in three and a half years. He was a three-time Big Ten All-Academic Team honoree.
And then there was the run. In four years, Purdue earned a top-four seed in the NCAA Tournament every time Gillis played. He appeared in 11 Tournament games, starting five. In 2024, the Boilermakers reached the national championship game behind Zach Edey — where they lost to UConn. Gillis had tasted everything college basketball had to offer except the last bite.
At Duke
Purdue's scholarship situation left Gillis without a spot for a fifth year, despite the extra eligibility granted by the COVID-19 blanket waiver. He entered the transfer portal and Duke came calling. 'It's been my dream to come to Duke,' Gillis said on The Brotherhood Podcast after committing. Scheyer's pitch was direct: 'Mason is all about winning and doing whatever his team needs. He brings an incredible competitiveness and toughness to our program, and his leadership will have a big impact on our team.'
Gillis was the second of three transfers Scheyer added that spring — after Maliq Brown from Syracuse and before Sion James from Tulane. All three were older, physical, content to be secondary options. ESPN described Scheyer's strategy explicitly: the goal was to 'build around Cooper Flagg' with 'not go-to scorers, but role players. Older, physical players who were content being a secondary option.' Gillis was the archetype.
At Duke, Gillis came off the bench in all 37 games he played, averaging 4.1 points and 2.6 rebounds in 15 minutes per game. His three-point shooting dipped from the 46.8% he'd hit at Purdue to 34.0% — the spacing and rhythm were different with five freshmen around him — but the impact went beyond the stat sheet. When Flagg picked up his fourth foul at Louisville in December with Duke trailing, Gillis entered and the Blue Devils immediately went on an 18-2 run to take control. When Maliq Brown went down with an injury in January, Gillis scored 12 points on four three-pointers against Miami in his first game as a larger-minute contributor. Against Wake Forest, he hit three threes for 11 points in 23 steady minutes.
The Duke Chronicle's season review captured it perfectly: 'His presence on the wing helped to maintain space on the floor and opened opportunities for his teammates to score on the inside.' When Cooper Flagg was asked about Gillis's role during the season, the freshman star didn't hesitate: 'We need him so desperately.'
In the ACC Tournament — played without Flagg after his ankle injury and without Brown after a shoulder injury — Gillis played 23 key minutes in the championship win over Louisville, finishing plus-12. In the NCAA Tournament, he had six points and four rebounds against Baylor and was a steadying presence through the Sweet 16 and Elite Eight wins over Arizona and Alabama. Duke reached the Final Four in San Antonio — Gillis's second in two years, with two different programs.
When asked after winning the ACC Tournament whether he was enjoying the moment, Gillis shut the question down: 'We haven't won.' In San Antonio, asked a similar question about the Final Four, he said the same thing: 'Nah, we still haven't won a championship.' The championship never came — Houston erased a 14-point Duke lead in the final eight minutes for a 70-67 win in the semifinal. Gillis's six-year college career ended two wins short of the only thing he didn't have. One hundred and seventy-one career games across two programs, two Final Fours, one national championship game appearance, zero titles.
Where Is He Now
In June 2025, Gillis signed with Hubo Limburg United of the BNXT League, a professional circuit featuring teams from Belgium and the Netherlands. The club's announcement read: 'With his flair, dedication, and scoring ability from a distance, Gillis fits perfectly into the philosophy of Hubo Limburg United.'
He is 25 years old — older than some NBA sophomores — and playing professional basketball in Belgium. He never heard his name called on draft night. He was never going to. That was never the point. The point was the 132 games at Purdue, the Big Ten Sixth Man of the Year trophy, the nine three-pointers at Mackey Arena, the degree earned in three and a half years, and then the 37 games at Duke — 'my dream,' as he called it — where a kid from New Castle, Indiana, who once played in the Little League World Series became the oldest player on a roster full of future lottery picks and held them together when it mattered most.
When the Duke Chronicle asked Gillis to reflect on his season, he didn't talk about his stats or his role. He talked about the people. 'It's an incredible season, incredible people, incredible relationships that I'm gonna have for the rest of my life,' Cooper Flagg had said after the Houston loss. Gillis would have said the same thing — if he hadn't been so busy refusing to celebrate anything short of a championship.
One hundred and seventy-one college games. Two programs. Two Final Fours. Six years. And when it was over, the kid from the Indiana Fieldhouse who gave up baseball for basketball went to Belgium, because there was still basketball to play and Mason Gillis was never going to be the one who stopped first.