The New York Islanders moved from Nassau Coliseum to Barclays Center before the 2015–16 NHL season.
The Islanders played the first NHL hockey game at Barclays Center in a preseason game on September 21, 2013, losing to the New Jersey Devils 3–0 in front of a crowd of 14,689.
The first goal in the arena's history was scored by Jacob Josefson of the New Jersey Devils.
An Islanders game was scheduled for the previous preseason but was canceled due to the 2012–13 NHL lockout.
The Islanders and Devils played again on September 26, 2014.
This time, the Islanders defeated New Jersey 3–2 in a shootout.
The first goal in Islanders Brooklyn history was scored in the first period on a power play (and a delayed penalty call) by defenseman Ryan Pulock.

The first regular season game was played on October 9, 2015 against the 2015 Stanley Cup champions the Chicago Blackhawks, who won the game 3–2 in overtime.
This was the sixth NHL game at Barclays Center, following five total preseason contests (three in 2015), and one Islanders rookie scrimmage.
The first NHL regular season goal scored in the Barclays Center was a shorthanded goal by Artem Anisimov for the Blackhawks in the first period, while John Tavares scored in the second period and was the first Islander to do so.

The first Stanley Cup playoffs game at Barclays Center was held on April 17, 2016, when the Islanders defeated the Florida Panthers 4–3 in game three of the first-round series between the two teams.
Seven nights later, the arena hosted game 6 of the series, which turned out to be the longest home game in Islanders history.
In that game, the Islanders were trailing 1–0 when Tavares scored the game-tying goal with 53.2 seconds left in regulation; he would score the series-clinching goal in double overtime to give the Islanders their first playoff series win since 1993.

The Islanders are scheduled to move to the newly-constructed UBS Arena in time for the 2021–22 season.
New York State governor Andrew Cuomo announced on February 29, 2020, that the Islanders would play all home games in the 2020–21 season at Nassau Coliseum, their former home.
It was also announced that the Islanders would play all of their home playoff games during the 2020 Stanley Cup playoffs at Nassau Coliseum, meaning that their final game played at the Barclays Center was scheduled to be on March 22, 2020, against the Carolina Hurricanes.
However, all NHL games were postponed on March 12 due to the COVID-19 pandemic in North America.
At that point in time, the Islanders had six home games left in the regular season, two in Brooklyn and four in Nassau County, as well as six road games, and were one point shy of the eighth and final playoff spot in the Eastern Conference.
The last Islanders game at Barclays Center before the season's pause was played on March 3, 2020, when the Islanders lost 6–2 to the Montreal Canadiens.
The Nassau Coliseum, however, was closed indefinitely in June 2020, and the Islanders will reportedly return to Barclays Center for the 2020–21 season if the Coliseum remains unavailable.
The New York Islanders moved from Nassau Coliseum to Barclays Center before the 2015–16 NHL season. The Islanders played the first NHL hockey game at Barclays Center in a preseason game on September 21, 2013, losing to the New Jersey Devils 3–0 in front of a crowd of 14,689. The first goal in the arena's history was scored by Jacob Josefson of the New Jersey Devils. An Islanders game was scheduled for the previous preseason but was canceled due to the 2012–13 NHL lockout. The Islanders and Devils played again on September 26, 2014. This time, the Islanders defeated New Jersey 3–2 in a shootout. The first goal in Islanders Brooklyn history was scored in the first period on a power play (and a delayed penalty call) by defenseman Ryan Pulock.
The first regular season game was played on October 9, 2015 against the 2015 Stanley Cup champions the Chicago Blackhawks, who won the game 3–2 in overtime. This was the sixth NHL game at Barclays Center, following five total preseason contests (three in 2015), and one Islanders rookie scrimmage. The first NHL regular season goal scored in the Barclays Center was a shorthanded goal by Artem Anisimov for the Blackhawks in the first period, while John Tavares scored in the second period and was the first Islander to do so.
The first Stanley Cup playoffs game at Barclays Center was held on April 17, 2016, when the Islanders defeated the Florida Panthers 4–3 in game three of the first-round series between the two teams. Seven nights later, the arena hosted game 6 of the series, which turned out to be the longest home game in Islanders history. In that game, the Islanders were trailing 1–0 when Tavares scored the game-tying goal with 53.2 seconds left in regulation; he would score the series-clinching goal in double overtime to give the Islanders their first playoff series win since 1993.
The Islanders are scheduled to move to the newly-constructed UBS Arena in time for the 2021–22 season. New York State governor Andrew Cuomo announced on February 29, 2020, that the Islanders would play all home games in the 2020–21 season at Nassau Coliseum, their former home. It was also announced that the Islanders would play all of their home playoff games during the 2020 Stanley Cup playoffs at Nassau Coliseum, meaning that their final game played at the Barclays Center was scheduled to be on March 22, 2020, against the Carolina Hurricanes. However, all NHL games were postponed on March 12 due to the COVID-19 pandemic in North America. At that point in time, the Islanders had six home games left in the regular season, two in Brooklyn and four in Nassau County, as well as six road games, and were one point shy of the eighth and final playoff spot in the Eastern Conference. The last Islanders game at Barclays Center before the season's pause was played on March 3, 2020, when the Islanders lost 6–2 to the Montreal Canadiens. The Nassau Coliseum, however, was closed indefinitely in June 2020, and the Islanders will reportedly return to Barclays Center for the 2020–21 season if the Coliseum remains unavailable.
Barclays Center