Ryans, the 2006 NFL Defensive Rookie of Year, had 123 tackles and one sack last season.
Pollard joined the team in late September and immediately stepped into a starting role to become a key piece of Houston's improving defense. He had 102 tackles, 1.5 sacks and four interceptions to help the Texans to their first winning season.
Daniels was one of the top receiving tight ends in the league before he tore a knee ligament in November. He had 40 catches for 519 yards and five touchdowns in eight games last season.
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