The Texans are expected to sign Hairston to their practice squad Wednesday, Aaron Wilson of KPRC 2 Houston reports.
The Texans waived Hairston on Tuesday.
Hairston (back) was spotted practicing during the Texans' minicamp session Tuesday, Michael Wyke of the Associated Press reports.
Hairston (back) was placed on injured reserve Wednesday, Aaron Wilson of KPRC 2 Houston reports.
Hairston (undisclosed) was carted off the field during practice Sunday, Aaron Wilson of KPRC 2 reports.
Hairston (chest) was listed as a full participant on the Texans' injury report Wednesday.
Hairston (chest) is inactive for Sunday's game against the Cowboys.
Hairston (ribs) is questionable for Sunday's matchup against Dallas.
Hairston (ribs) was a non-participant at practice Thursday, Aaron Wilson of ProFootballNetwork.com reports.
Hairston (ribs) is not participating in Wednesday's practice, Brooks Kubena of the Houston Chronicle reports.