Abdullah, a junior, and the sophomore Gregory were selected by Big Ten coaches and media.
Senior center Cole Pensick made the coaches' second team.
Abdullah leads the Big Ten and ranks seventh nationally with 1,568 rushing yards. The total ranks him fifth all time on Nebraska's single-season list. He was a second-team all-conference pick by the coaches last year after rushing for 1,137 yards. He could become the first player in Nebraska history next year to reach 1,000 yards in three seasons.
Gregory, in his first year at Nebraska, leads the Big Ten with 9½ sacks and ranks second to Ryan Shazier in tackles for loss with 15½. A former Purdue recruit, Gregory transferred to Nebraska before this season from Arizona Western Community College.
Abdullah and Gregory are both eligible to enter the NFL draft this season. They have not indicated plans to leave school early.
Evans earned first-team All-Big Ten honors from ESPN.com a year ago and was named honorable mention by the coaches. He set a Nebraska record for a defensive back with 10½ tackles for loss this season and intercepted four passes.
Jean-Baptiste also recorded four interceptions and ranked fifth in the league with 11 pass breakups.
Honorable-mention recognition from the coaches went to defensive end Jason Ankrah, receiver Kenny Bell, safety Corey Cooper and offensive linemen Jeremiah Sirles and Andrew Rodriguez. Media honorable mention went to Ankrah, Bell, Pensick, Rodriguez, Sirles and place-kicker Pat Smith.