Ontario Christian girls basketball's Tatianna Griffin transfers to Mater Dei

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Ontario Christian girls basketball player Tatianna Griffin has transferred to Mater Dei, Monarchs coach Jody Wynn confirmed Monday night.

“Yes, she is registered and enrolled at MD,” Wynn said.

Wynn confirmed the transfer after a post earlier Monday from a verified Griffin social media account that read, “I will now be attending” Mater Dei.

The 6-foot-1 guard helped lead Ontario Christian to CIF State Open Division and national titles.

Griffin is rated as the top player nationally in the Class of 2028 by ESPN’s SportsCenter NEXT.

Last season, Griffin averaged 21.3 points, 7.9 rebounds and 3.2 assists in 36 games for Ontario Christian (34-2), the MaxPreps national champion.

She played with, among others, senior-to-be point guard Kaleena Smith, the No. 1 player in the Class of 2027 by ESPN’s SportsCenter Next.

Griffin shot 46 percent from the floor last season. She made 87 of 224 3-pointers (39 percent) and 89 of 112 free throws (79 percent).

In late May, Griffin was selected to the U17 U.S. national team that will play in the FIBA U17 Women's World Cup in Czechia, July 11-19. USA Basketball listed her age at 16 as of May 14, 2026.

Last season, Mater Dei defended its Trinity League title and lost to Sierra Canyon in the CIF-SS Open Division quarterfinals. The Monarchs reached the Division I semifinals in the SoCal regional.

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This story was originally published June 8, 2026 at 7:28 PM.