Bio Blast: San Francisco guard Tyrone Riley IV

We’re less than a week away from the transfer portal window officially opening. But some talented players are already getting the ball rolling early ahead of the April 7 start date.

The latest expected portal entry of note is San Francisco’s Tyrone Riley IV, a 6-foot-6, 200-pound wing who was named to the 2025-26 All-West Coast Conference Second Team. Jacob Polacheck of KSR+ reports that Kentucky is likely to be involved with the sophomore guard out of California. Riley will have two years of eligibility remaining at his next stop.

For those who followed Kentucky’s offseason recruiting efforts closely last season, Riley will be a familiar name to you. In KSR’s latest Bio Blast, we’re going to learn more about Riley’s career path and what stands out about his game.

[Where things stand between Kentucky and San Francisco transfer Tyrone Riley IV]

Riley nearly left San Francisco last offseason

Riley put up big numbers in high school for St. Pius X-St. Matthias (CA), good enough to earn offers from the likes of Texas A&M, Arizona State, Southern California, Florida, Xavier, and more. But he opted for staying close to home, committing to San Francisco in Nov. 2023, following in the footsteps of his father. Tyrone Riley Sr. played for the Dons from 2003-05, averaging 13.6 points per game in his two seasons with the program.

The apple didn’t fall too far from the tree. The younger Riley made an immediate impact as a true freshman at San Francisco in 2024-25, averaging 9.6 points and six rebounds in 28.2 minutes per outing. He started all 34 games for the Dons, shining in his college debut with 26 points (10-18 FG) against Cal Poly. Riley shot 50.2 percent from the field, 32.3 percent from deep, and 73.5 percent from the line on the season, picking up a pair of WCC Freshman of the Week honors along the way. He ultimately landed himself a spot on the All-WCC Freshman Team as San Francisco finished 25-10 (13-5 WCC).

Riley then elected to hit the transfer portal last offseason. Kentucky was among the schools involved. Mark Pope, who recruited Riley while at BYU, got to know Riley even more in the portal and then served as one of his coaches at the USA Basketball Men’s U19 National Team Training Camp in Colorado Springs that summer. Assistant coach Jason Hart even flew out west to meet with Riley’s family, although Hart is no longer on UK’s staff. Riley said he saw the fit with Kentucky, but the timing did not match up, leading him to return to the Dons for another season.

As a sophomore in 2025-26, Riley posted per-game averages of 12.2 points, 4.8 rebounds, 1.2 assists, and one steal in 31.8 minutes on shooting splits of 47.2/36.8/70.7. But the wins didn’t follow. San Francisco finished 17-16 (8-10 WCC). Riley was one of three Dons named to the All-WCC Second Team. Now he’s back in the portal for a second time.

What the advanced stats say about his game

Riley is not a high usage player, but he is consistently making an impact on both ends of the floor. The lefty is capable of shouldering a heavy minutes load while maintaining efficient scoring. His season-long numbers compared to his 13 matchups against Quad 1 and 2 opponents are similar. Adjusting to the next level should not be a weakness for him if he jumps to the high-major ranks.

For a guard, the long and athletic Riley is among the best at hitting the glass. He ranks in the 90th percentile or better, per CBB Analytics, in both offensive and defensive rebounds per game. His shooting numbers (combined with decent volume) are all above average. While his assist rate is low, so is his turnover rate — he’s also not a preferred on-ball player. The playmaking skills are lacking, but Riley stands out in most other categories. His block rate of 1.5 percent (80th percentile) is impressive for a guard.

Riley is someone who was garnering NBA Draft buzz last offseason. That died down a bit throughout his sophomore campaign despite the increased production, but he’ll still attract the eyes of pro scouts wherever he lands next season. Could that be in Lexington?

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