The three round out a day that figured to be promising for the Crimson and Cream and turned out to be just that way.
Several other Sooners, including defensive ends Frank Alexander and Ronnell Lewis, linebacker Travis Lewis and tight end James Hanna, are still slated to be possible picks on the third and final day of the draft in rounds three through seven.
Broyles, the all-time NCAA receptions leader, finished his career with 349 catches and 45 touchdowns, including 4,586 yards.
That mark placed him second in FBS history to only Wyoming wide receiver Marcus Harris, who accumulated 5,005 yards throughout his career.
He shattered numerous Sooner records, including the receptions, receiving touchdowns and yardage marks, among others.
Despite missing the final four games of the season, Broyles still led the team with 1,157 yards and 10 touchdowns on 83 catches.
In 13 outings last year, Stephenson anchored an offensive line that only allowed 11 sacks all season.
He recorded 16 knockdowns against Texas A&M en route to earning honorable mention All-Big 12 by both the AP and coaches.
The 6-foot-6, 312-pounder started 10 of 14 games the previous season, playing 868 snaps while accumulating 103 knockdowns, which ranked second on the team.
Stephenson played in seven games as a reserve back in 2008 after redshirting his first season in 2007 and did not see any action in 2009.
In his final season at OU, Fleming was an All-Big 12 First Team selection by both the AP and coaches after finishing second on the team with 10 pass break ups, while also recording two fumble recoveries, two forced fumbles and an interception at the boundary position.
The 5-foot-11, 206-pounder started all 11 games and starred when he stripped and returned a fumble 56 yards to the house against Texas.
He finished fifth on the team with 60 tackles.
Fleming started the final 24 games of his career and played in 51 total throughout his four seasons following a redshirt year in 2007.