The 7-foot Zimmerman, who is a top 10 prospect in the '15 class nationally, landed an offer from the Cardinals on Wednesday night.
Zimmerman said he had 15 schools text him just after the midnight deadline last week, including U of L. He has also landed offers from Kentucky, Kansas, Arizona, UCLA, USC, Connecticut, Michigan, Michigan State, Oregon and Notre Dame.
Zimmerman attends Las Vegas Bishop Gorman and plays for the Dream Vision AAU team. The Cardinals' staff will evaluate him this summer.
U of L has also offered top post players Daniel Giddens of Marietta, Ga., and Cheick Diallo of Centerreach, N.Y.