Thomas (ankle) will accompany the Blues on their upcoming three-game road trip, which begins with Thursday's game in Buffalo, so that he can skate with the club, per Lou Korac of NHL.com.
Thomas will be out for at least six weeks after suffering a fractured ankle against Winnipeg on Tuesday. As a result, the team designated him for injured reserve.
Thomas picked up two assists, one on the power play, in Friday's 5-2 loss to the Hurricanes.
Thomas scored a goal and added an assist in Wednesday's 5-2 win over Chicago.
Thomas recorded three assists in Thursday's 4-0 win over the Islanders.
Thomas had a goal and two assists in Thursday's 6-3 win over Edmonton.
Thomas scored a power-play goal and added three assists, two with the man advantage, in Sunday's 7-2 win over the Canadiens.
Thomas dished out an assist, three shots on net and a plus-2 rating across 24:04 of ice time in Sunday's 4-3 overtime win versus the Kings.
Thomas collected three assists in Thursday's 4-1 win over the Panthers.
Thomas scored a goal on four shots in Thursday's 2-1 win over the Coyotes.