Senior receiver Corey Smith and junior H-back Dontre Wilson are the other two players. The school said they violated athletic department policy.
The violation was some combination of marijuana and academics, ESPN’s Joe Schad reports.
Bosa, a rising junior, was a unanimous All-America selection last season after leading the Big Ten with 13.5 sacks and 21 tackles-for-loss. He has received numerous preseason honors this year and was named to several award watch lists. SI.com’s Chris Burke named Bosa the top 2016 NFL draft prospect in the Big Ten.
Marshall was OSU’s second-leading receiver last season as a true freshman, with 38 catches for 499 yards and six touchdowns.
Smith, a fifth-year senior, joined Ohio State as a junior college transfer in 2013 and saw his first action with the Buckeyes last season. He caught 20 passes for 255 yards.
Wilson broke his ankle against Michigan State last November and had two surgeries to repair the injury. He had 21 receptions for 300 yards and three touchdowns as a sophomore in 2014.
Last season, the Hokies were the only team to defeat the eventual champion Buckeyes.
Update: Head coach Urban Meyer has commented on Bosa's suspension.
- Dan Gartland