Ronald Harper Jr. Bio
Ronald Harper Jr. is an American professional basketball player for the Boston Celtics of the National Basketball Association (NBA). He signed with the Celtics in October 2025 and was converted to a two-way contract. Harper previously played for the Toronto Raptors organization, the Maine Celtics, and the Motor City Cruise. He played college basketball for the Rutgers Scarlet Knights of the Big Ten Conference from 2018 to 2022. Harper is the son of former NBA player Ron Harper, who won five NBA championships during his 15-year professional career. His younger brother Dylan Harper currently plays for the San Antonio Spurs after being selected second overall in the 2025 NBA Draft.
Early Life and Background
Harper was born in Paterson, New Jersey, on April 12, 2000, while his father, Ron Harper, was playing for the Los Angeles Lakers in the NBA. He grew up in Upper Saddle River, New Jersey, and Franklin Lakes, New Jersey. Harper began playing basketball under the coaching of his mother, Maria Harper, who played college basketball for the University of New Orleans during the 1993-1994 season. She is of Filipino descent and served as head coach of the DePaul Catholic High School girls’ varsity team in New Jersey before becoming an assistant coach for the boys’ team at Don Bosco Preparatory High School, where she coached both Ron Jr. and his brother Dylan.
Harper competed on the Amateur Athletic Union circuit for Ring City Basketball, a program owned and operated by his parents. His maternal grandfather represented the Philippines in Basque pelota at the 1968 Summer Olympics. Harper attended Don Bosco Preparatory High School in Ramsey, New Jersey, where he developed into a highly regarded prospect under his mother’s guidance.
Path to Professional Basketball
During his junior season at Don Bosco Prep, Harper averaged 10.1 points and 1.5 rebounds per game while shooting 37 percent from three-point range. He helped the team capture its first Non-Public A state title in 47 years. As a senior, Harper elevated his production significantly, averaging 20.8 points and 3.9 rebounds per game. He led Don Bosco Prep to its second consecutive Non-Public A state championship and scored a career-high 33 points in the Tournament of Champions final against Roselle Catholic High School.
Harper was named North Jersey Player of the Year by The Record newspaper. Despite being considered a four-star recruit by Rivals, his only Power Five scholarship offers came from Nebraska and Rutgers. On August 11, 2017, Harper committed to play college basketball for Rutgers, following in the footsteps of his father who played at Miami (Ohio).
Ronald Harper Jr. Career
Rutgers Scarlet Knights (2018–2022)
Harper made his collegiate debut against Fairleigh Dickinson, posting 15 points. During his freshman season, he averaged 7.8 points and 3.1 rebounds per game. He improved significantly in the offseason, adding 15 pounds to his frame through strength and conditioning work. During his sophomore season, Harper became a regular starter for Rutgers. He recorded a season-high 29 points and nine rebounds in an 85-80 loss to Iowa on January 22, 2020. On February 25 of that year, he scored 27 points while shooting 5-of-5 from three-point range in a 72-57 victory over Illinois.
As a sophomore, Harper averaged 12.1 points and 5.8 rebounds per game, earning All-Big Ten Honorable Mention and second-team All-Met honors. He continued his development as a junior, scoring a career-high 30 points with five three-pointers in a 96-75 win over Fairleigh Dickinson. Harper helped lead Rutgers to their first NCAA Tournament appearance in 30 years. He averaged 14.9 points and 5.9 rebounds per game that season before declaring for the 2021 NBA draft, ultimately opting to return to Rutgers.
In his final collegiate season, Harper delivered a signature performance on December 9, 2021. He tied his career high of 30 points while adding 10 rebounds against Purdue. Most remarkably, he made a game-winning buzzer-beater from just inside halfcourt to give Rutgers a 70-68 victory, marking the program’s first win against a No. 1 ranked team in school history. Following Rutgers’ loss in the First Four of the 2022 NCAA tournament, Harper announced he would forgo his remaining collegiate eligibility and enter the 2022 NBA draft. He was ultimately undrafted but earned honorable mention All-American honors by the Associated Press and second-team All-Big Ten recognition.
Toronto Raptors and Raptors 905 (2022–2023)
After going undrafted in 2022, Harper signed a two-way contract with the Toronto Raptors on July 14, 2022. The Raptors assigned him to Raptors 905, their NBA G League affiliate. He made his professional debut during the 2022-2023 season. Harper signed another two-way contract with the Raptors on July 22, 2023, but was waived on December 8, 2023.
Maine Celtics (2024–2025)
Harper joined the Boston Celtics for the 2024 NBA Summer League before signing with the team on July 14, 2024. However, he was waived on October 17, 2024. He subsequently joined the Maine Celtics, Boston’s G League affiliate, on October 26, 2024.
Detroit Pistons and Motor City Cruise (2025)
On January 6, 2025, Harper signed a two-way contract with the Detroit Pistons. While playing for their G League affiliate, the Motor City Cruise, he set a franchise record on February 1, 2025, by making 11 three-pointers in a single game, connecting on 11 of his 18 attempts from beyond the arc in a 145-132 victory over the Long Island Nets. This broke the previous record of seven three-pointers held jointly by Deividas Sirvydis and Stanley Umude.
Boston Celtics (2025–Present)
On August 16, 2025, the Boston Celtics signed Harper to a training camp contract. Following the release of RJ Luis Jr., Harper was converted into a two-way contract on October 16, 2025. He made his first NBA start on February 4, 2026, against the Houston Rockets, recording 11 points, nine rebounds, and three assists in a 114-93 victory. Harper received praise for his defensive performance against Kevin Durant during that game.
On March 10, 2026, Harper scored a then career-high 22 points on 8-for-11 shooting, including 6-for-9 from three-point range, in a 125-116 loss against the San Antonio Spurs. He was promoted to Boston’s standard roster on April 4, 2026, and subsequently signed a two-year NBA contract. On his 26th birthday, April 12, 2026, Harper scored a career-high 27 points along with seven rebounds, four assists, and three steals in a 113-108 victory over the Orlando Magic.
Playing Style and Strengths
Harper plays primarily as a small forward but can also operate as a shooting guard. He has demonstrated the ability to score from both mid-range and beyond the three-point arc. His shooting touch from three-point range has been a consistent weapon throughout his career, including his record-setting 11 three-pointer performance in the G League. Harper has shown capability as a rebounder and has developed into a capable defender. His experience playing for multiple organizations has allowed him to adapt his game to different team systems and roles.
Notable Achievements
Harper earned All-NBA G League Third Team recognition in 2026. In college, he was named an AP Honorable Mention All-American in 2022 and was a two-time All-Big Ten selection, making second-team in 2022 and third-team in 2021. He won the Haggerty Award in 2022, given to the top player in the New York metro area. His game-winning buzzer-beater against top-ranked Purdue stands as one of the most memorable moments in Rutgers basketball history.
Ronald Harper Jr. Career Highlights
Harper has built a career spanning multiple NBA organizations and G League teams since entering professional basketball in 2022. His most prolific scoring output came during his time with the Motor City Cruise, where he set a franchise record with 11 three-pointers in a single game. In the NBA, his career-high came with the Boston Celtics, scoring 27 points against the Orlando Magic on April 12, 2026. He earned recognition on the All-NBA G League Third Team in 2026 and was named to the All-Big Ten Second Team during his final college season.
Rutgers Scarlet Knights Highlights
During his four collegiate seasons, Harper appeared in over 100 games and established himself as one of the most productive players in Rutgers history. He helped lead the program to its first NCAA Tournament appearance in three decades. His signature moment came on December 9, 2021, when his buzzer-beating halfcourt shot defeated top-ranked Purdue for Rutgers’ first-ever win against a No. 1 team. Harper finished his college career with averages of 12.2 points and 4.9 rebounds per game across 115 appearances.
Professional Career Highlights
In the G League, Harper demonstrated his scoring ability by setting the Motor City Cruise record with 11 three-pointers made in one game. With the Boston Celtics, his first NBA start resulted in an impressive all-around performance of 11 points, nine rebounds, and three assists against a playoff team. He closed the 2025-2026 season with a career-high 27-point performance on his birthday.
Ronald Harper Jr. Family
Family Background and Basketball Lineage
Harper comes from a distinguished basketball family. His father, Ron Harper, was an All-American college player at Miami (Ohio) before embarking on a 15-year NBA career that included five championship titles, three with the Chicago Bulls during the 1990s and two with the Los Angeles Lakers in the early 2000s. His mother, Maria Harper (née Pizarro), is originally from Bataan, Philippines, and played college basketball for the University of New Orleans during the 1993-1994 season.
Maria Harper coached Ron Jr. and his brother Dylan during their high school careers at Don Bosco Prep. She served as head coach of the DePaul Catholic High School girls’ varsity team before becoming an assistant coach for the boys’ team at Don Bosco. The family’s basketball tradition continues through Ron Jr.’s younger brother, Dylan Harper, who joined the Rutgers basketball team in 2024 before being selected second overall by the San Antonio Spurs in the 2025 NBA Draft. Harper has expressed interest in playing for the Philippines national basketball team but was unsuccessful in obtaining a Filipino passport during high school.
2025 Season Performance
The 2025 season represented a significant chapter in Harper’s professional career as he navigated the transition between NBA and G League competition. After beginning the season with the Maine Celtics, he signed with the Detroit Pistons organization in January 2025. While with the Motor City Cruise, Harper showcased his shooting ability by breaking the franchise record for three-pointers in a single game with 11 makes against the Long Island Nets. This performance demonstrated his ability to be a prolific scoring threat when given expanded opportunities.
Following his time with the Pistons organization, Harper joined the Boston Celtics for training camp in August 2025 and earned a conversion to a two-way contract in October. The opportunity to work within the Celtics’ system provided him with valuable NBA-level experience and development resources. His eventual promotion to the standard roster and two-year contract extension validated his persistence and improvement throughout the season.