Matt Bryant had 22 points and four steals and Hunter Ecklund added 19 points and five assists as La Center won its sixth straight.
After an 18-18 first quarter, the Wildcats seized control in the second quarter, taking a 43-29 lead into the intermission.
Avery Seter had 15 points and five rebounds.
With King’s Way Christian’s loss, La Center (10-6, 6-0 Trico) has a two-game lead in the Trico League with four to play. The Wildcats host second-place King’s Way on Tuesday.
For Stevenson, Isaac Hoidal had 12 points and 11 rebounds, Maclain Hall added 16 points and five rebounds and Charles Hobbs had 10 rebounds.