Offensive lineman from South Carolina was 142nd pick in 2012 draft.
Chris Givens also returned kicks for the Demon Deacons.
The Rams addressed their greatest area of need with the first pick of the second round taking wide receiver Brian Quick of Appalachian State on Friday night.
At about 6-2, 204 lbs., Johnson could play corner for the Rams, but his skill set could translate to the free safety position.
Now a backup for Rams running back Steven Jackson, Pead told reporters that he plans on being in the All-Pro’s back pocket.
While a member of the Florida Gators from the 2008-10 seasons, he was just the second true freshman to start at cornerback on opening day.
At 6-3, 222 lbs., Quick was a fifth-year senior starting 36 out of 54 career games catching 202 passes for 3,418 yards and 31 touchdowns.
Only a couple of hours after learning he was the No. 14 overall pick in the NFL Draft, Brockers joined Scott Warmann.
At 6-5, 322 lbs., Brockers’ main talent is against the run and not so much the pass as he only had 2 sacks during his collegiate career.