Nebraska quarterback Tanner Lee is expected to replace Rudolph on the roster for the annual all-star game in Mobile, Ala.
Bell, 32, will join the staff of new Seminoles head coach Willie Taggart, who took over after Jimbo Fisher left to take the Texas A&M head coaching job.
Notre Dame did not offer any additional details, although Stepherson and Holmes were arrested in December for shoplifting at an area mall in South Bend, Ind.
The 6-3, 213-pound Hilinski was discovered in his apartment after he didn't show up for practice Tuesday.
The former Alabama sophomore announced his departure from Tuscaloosa on Monday night. Brown applied to TSU more than a month before the College Football Playoff title game, the Tennessean reported.
The deadline for undergraduate declarations for the upcoming NFL draft was 5 p.m. ET Monday.
His father, Christopher Love, told multiple outlets of his son's decision late Monday night.
Although it took him until the deadline day to declare, his decision comes as no surprise, considering he is a potential top 10 pick. NFLDraftScout.com rates him as the No. 9 prospect.
Jackson died Friday night, according to media reports.