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O'Brien scored a goal on three shots and added four hits in Wednesday's 5-2 win over the Edmonton Oilers.
O'Brien scored a goal on four shots and logged three hits in Sunday's 5-2 win over the San Jose Sharks.
O'Brien notched an assist, 10 hits and a plus-2 rating in Friday's 7-4 win over the Vegas Golden Knights.
O'Brien notched an assist in Friday's 4-0 win over the Detroit Red Wings.
O'Brien recorded an assist, five hits and 10 PIM in Thursday's 5-2 loss to the Minnesota Wild.
O'Brien logged an assist and two hits in Sunday's 5-2 win over the Washington Capitals.
O'Brien is considered day-to-day with an upper-body injury and won't play Wednesday versus the Minnesota Wild.
O'Brien notched an assist and four hits in Monday's 5-2 win over the Pittsburgh Penguins.
O'Brien has gone 13 games without a point after he was held scoreless Thursday in a 2-1 loss to the Vancouver Canucks.
O'Brien picked up an assist and seven PIM in Thursday's 4-3 overtime win over the Colorado Avalanche.
O'Brien scored a goal in Saturday's 5-3 loss to the Winnipeg Jets.
O'Brien scored a goal, dished an assist, went plus-4, logged two hits and added seven PIM in Monday's 8-1 win over the Chicago Blackhawks.
O'Brien notched an assist, four hits, two shots on goal and two PIM in Friday's 5-4 loss to the Los Angeles Kings.
O'Brien scored two goals on four shots, added four hits and went plus-2 in Thursday's 5-4 overtime loss to the Vancouver Canucks.
O'Brien provided an assist and two PIM in Monday's 4-1 loss to the Seattle Kraken.
O'Brien logged an assist and two hits in Thursday's 3-2 win over the Vancouver Canucks.
O'Brien (illness) will draw back into the lineup for Thursday's game against the Nashville Predators.
O'Brien (illness) won't play versus the St. Louis Blues on Tuesday.
O'Brien provided an assist, four shots on goal and two hits in Sunday's 5-4 overtime loss to the New Jersey Devils.
O'Brien registered an assist and two hits in Saturday's 6-5 shootout loss to the Los Angeles Kings.
O'Brien (upper body) is set to return to the lineup Wednesday versus the Tampa Bay Lightning, per the NHL media site.
O'Brien (upper body) will not play Monday against the Nashville Predators.
O'Brien is considered to be day-to-day with an upper-body injury.
O'Brien (hand) will return to the lineup Friday versus Chicago, Craig Morgan of PHNX Sports reports.
O'Brien (hand) has begun skating but won't be ready to play against the Minnesota Wild on Monday, Craig Morgan of PHNX Sports reports.
O'Brien is dealing with a hand injury and could return as soon as the second week of February, Craig Morgan of PHNX Sports reports.
O'Brien (upper body) is still not ready to return.
O'Brien suffered an upper-body injury Friday and is considered week-to-week.
O'Brien will be a game-time decision Saturday versus Buffalo because of an undisclosed injury, according to Craig Morgan of PHNX Sports.
O'Brien notched an assist, two shots on goal and five hits in Sunday's 5-4 overtime win over the Philadelphia Flyers.
O'Brien registered an assist, two shots on goal and three hits in Saturday's 3-2 overtime loss to the Vancouver Canucks.
O'Brien scored a goal on two shots, dished an assist, logged three hits and went plus-2 in Tuesday's 4-1 win over the Buffalo Sabres.
O'Brien notched an assist and three hits in Tuesday's 6-3 win over the Columbus Blue Jackets.
O'Brien logged three points, 139 hits, 106 PIM and 36 shots on net in a career-high 39 games this season.
O'Brien (upper body) will be back in the lineup versus Dallas on Wednesday, Arizona Coyotes Insider Craig Morgan reports.
O'Brien (upper body) may be ready to play against the Dallas Stars on Wednesday, Jose M. Romero of The Arizona Republic reports.
O'Brien (upper body) has been placed on injured reserve, per the NHL media site.
O'Brien (upper body) signed a two-year contract extension Sunday.
O'Brien is listed as week-to-week after suffering an upper-body injury against the Vegas Golden Knights on Friday.
O'Brien added a goal in a 7-3 loss to the New York Rangers on Saturday.
O'Brien logged five PIM in a 4-0 loss to the New York Islanders on Friday.
O'Brien recorded 17 PIM, three hits and two shots on goal in Saturday's 4-2 loss to the Nashville Predators.
O'Brien has no points in his last eight games.
O'Brien logged an assist, 17 PIM and two hits in Friday's 3-1 loss to the Anaheim Ducks.
O'Brien scored a goal on his only shot and racked up a game-high eight hits in Monday's 5-3 loss to Florida.
O'Brien notched two assists, two hits and a plus-2 rating in Wednesday's 4-3 win over the St. Louis Blues.
O'Brien had one hit and 12 PIM in Wednesday's 8-3 loss to the Minnesota Wild.
O'Brien was promoted to the active roster Wednesday.
O'Brien had one shot on net and five hits over 7:36 of ice time in Friday's 3-2 win over the St. Louis Blues.
O'Brien will make his Avalanche debut Friday against the St. Louis Blues.
O'Brien has signed a one-year contract with the Colorado Avalanche.
O'Brien was waived by the Colorado Avalanche on Tuesday, Elliotte Friedman of Sportsnet reports.
Assigned C Liam O'Brien to Hershey (AHL).
Recalled C Liam O'Brien from Hershey (AHL).
Assigned C Liam O'Brien to Hershey (AHL).
Waived C Liam O'Brien.
Re-signed C Liam O'Brien to a one-year, two-way contract worth $700,000.
Assigned C Liam O'Brien to Hershey (AHL).
Waived C Liam O'Brien.
Signed C Liam O'Brien to a one-year, two-way contract.
Assigned C Liam O'Brien to Hershey (AHL).
Recalled C Liam O'Brien from Hershey (AHL).
Re-signed C Liam O'Brien to a one-year, two-way contract worth $650,000.
Assigned C Liam O'Brien to Hershey (AHL).
Recalled C Liam O'Brien from Hershey (AHL).
Assigned C Liam O'Brien to Hershey (AHL).
Assigned C Liam O'Brien to Hershey (AHL).
Assigned C Liam O'Brien to Hershey (AHL).
Signed C Liam O'Brien to a three-year, entry-level contract.