Williams caught 54 passes for 594 yards and four touchdowns in 16 games last season.
The 27-year-old’s never missed a game in his four-year career.
Williams remains a staple of the Cowboys’ passing game, lining up opposite Dez Bryant.
Carroll recorded 55 tackles, a forced fumble, and an interception playing in all 16 games for the Philadelphia Eagles last year.
The cornerback is expected to bolster a Cowboys secondary that’s in desperate need of reinforcements.
Copyright © 2017 Score Media Ventures Inc. All rights reserved. Certain content reproduced under license.