Jackson is one of four starters from last year's team to opt out.
The group seeks to diversify the collegiate and professional coaching ranks.
Venerable is a three-star defensive back from Maryland.
Bam's older brother, Anthony, is a redshirt freshman defensive lineman for the Terps.
He previously committed to LSU in December.
Penn announced he would play at LSU.
Voluntary football workouts have been suspended.
The season is still due to start in early September despite the schedule change.