Frazier, a 6-3 senior forward, also grabbed a game-high 14 rebounds. Tylon Deal, an Associated Press first-team All State guard, added 14 points in a game Peoria (30-2) never trailed.

Senior guard Keifer Sykes scored 17 points to lead Marshall (27-8), while Alphonso McKinnie had 12 rebounds.

Peoria, which outscored Marshall 28-18 in the paint, led by as many as 18 points in the third quarter.

Country Club Hills 49, Champaign Centennial 42: Guard Eric Gaines scored 17 points and grabbed seven rebounds to lead Country Club Hills Hillcrest to a victory over defending Class 3A champion Champaign Centennial in the other semifinal.

Big 12 Conference champion Centennial (31-2) shot only 30 percent from the field, as both teams combined to score only 29 points in the first half.

Gaines, a first-team Associated Press all-stater, grabbed seven rebounds, and teammate Julius Brown scored 13 points for the Hawks (30-3).

All-State guard Rayvonte Rice led Centennial with a game-high 20 points.

Class 4A

Chicago Simeon 48, O’Fallon 42: Brandon Spearman’s 19 points pushed Chicago Simeon past O’Fallon during the first 4A semifinal.

The unranked Wolverines (24-9) played smothering defense all night, holding O’Fallon (31-2) scoreless for the final 5:30 of the first half.

Junior guard Roosevelt Jones, who averages 19.3 points per game and 12 rebounds, led O’Fallon with 22 points and 19 rebounds — both game highs.

Chicago Whitney Young 60, Waukegan 58: Senior guard Ahmad Starks nailed a 15-foot shot from the left wing with less than a second left to lift Chicago Whitney Young over Waukegan in the second 4A semifinal.

The Bulldogs (23-6) were led by forward Anthony Johnson, who scored 20 points and grabbed seven rebounds. Starks added 15, while guard J.R. Reynolds chipped in 11.

Forward Quan Connor led Waukegan (26-5) with 14 points and seven rebounds. First-team AP All-Star Jereme Richmond, an Illinois recruit, was held to 12 points all of them in the second half. Guard Aaron Johnson also scored 12 points for the Dolphins.