Beckham has run the 40-yard dash in 4.43 seconds. He caught 57 passes last season for 1,100 yards and eight touchdowns.
Cobb rushed for 1,991 yards and 26 touchdowns as a junior and was named Mid-South Offensive Player of the Year. He was sidelined for several gaems last season, rushing for six touchdowns.
Gaines is a 6-foot-1, 185-pound cornerback who's a two-time All-Conference USA selection.
He has four career interceptions and 42 pass deflections.
Gaines is projected by draft analysts as a third round pick.
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Aaron Wilson covers the Ravens for The Baltimore Sun