The basics
Grivna plays for Ballard High School in Louisville. ESPN lists him at 6-foot-10 and 215 pounds. Prep Hoops lists him at 6-foot-11 and has him with Wildcat Select on the 3SSB circuit. Listed as a C at Ballard, and he appears on the Kentucky board. Status: uncommitted.
The boards
ESPN ranks Grivna No. 18 in the class. Prep Hoops ranks him No. 1 in Kentucky. Prep Hoops' Steve Quattrocchi wrote that he is a top 20 prospect in America by most national rankings sites and that he is likely better than that. On3's scouting report said he is capable of scoring over either shoulder in the post, and most comfortable over his left shoulder.
Production
On3 reported 20.1 points, 8.0 rebounds, and 3.0 blocks a game through two adidas 15u sessions. Prep Hoops wrote that he shot 45 percent from three last season and collected All-7th Region, All-State, and MaxPreps All-American honors as a freshman.
The recruitment
On3 reported a Louisville offer during an unofficial visit and named Florida State, Georgia Tech, Indiana, Iowa, Texas Tech, and Villanova among programs on the sheet. Phenom Hoops also named Arizona State and Virginia Tech. He is uncommitted.
The look
Grivna out of Ballard: On3 reported 20.1 points, 8.0 rebounds, and 3.0 blocks a game through two adidas 15u sessions. Prep Hoops wrote that he shot 45 percent from three last season and collected All-7th Region, All-State, and MaxPreps All-American honors as a freshman. On3 reported a Louisville offer during an unofficial visit and named Florida State, Georgia Tech, Indiana, Iowa, Texas Tech, and Villanova among programs on the sheet.
On3 reported a Louisville offer during an unofficial visit and named Florida State, Georgia Tech, Indiana, Iowa, Texas Tech, and Villanova among programs on the sheet. Phenom Hoops also named Arizona State and Virginia Tech. He is uncommitted. Grivna is No. 20 on the class of 2029 board. The 2029 question on Grivna is whether Ballard adds to 20.1 points, 8.0 rebounds. No. 20 stands until it does.
What to watch
The 45 percent three-point note from Prep Hoops is the swing skill for a 6-foot-10 freshman. The next grade is whether that holds on a bigger sample.
Sources: ESPN, Prep Hoops, On3, Phenom Hoops, and the CBR board as of 2026-08-24.
