2008-09: Sean Backman led Yale with 20 goals as a junior as the Bulldogs finished first in ECAC Hockey. In the ECAC championship game he had a hat trick as Yale defeated Cornell, 5-0. Backman also had 13 assists and was +12 with 44 PMs appearing in 32 of 34 games. Eight of his 20 goals were scored on the power play.
2009-10: Backman scored 21 goals as a senior and was one of seven players with 25 or more points for Yale as the Bulldogs once again captured the ECHL Hockey regular season title. The Bulldogs fortunes were not as kind in the post-season; a three-game ECAC quarterfinal series loss to Brown and a wild 9-7 loss to eventual national champion Boston College in the NCAA Northeast Regional Final. Backman finished with 14 assists to go along with his 21 goals and was +13 with 12 PMs in 29 games. He had nine power play goals for Yale and signed a free agent contract with the Dallas Stars in March 2010.
2010-11: Backman opened his first pro season with Texas (AHL) and spent a five-game stretch with ECHL Idaho in November before returning to the AHL for the rest of the year. In 67 regular season games with Texas he scored 7 goals with 16 assists and was +1 with 20 PMs. Backman skated in all six playoff games with the Stars during their first-round series with Milwaukee and was scoreless and -4 with 6 PMs. Beckman signed a one-year, two-way contract with the Islanders in August 2011.
2011-12: Backman skated in 66 AHL games with Islanders' affiliate Bridgeport in his second pro season. He scored 7 goals with 11 assists and was minus-11 with 20 penalty minutes. The Sound Tigers finished first in the Northeast but lost in the first round in the playoffs. Backman was minus-two with no points nor penalties in the three-game series with Connecticut. He was re-signed, as an unrestricted free agent, to a one-year, two-way contract by the Islanders in July, 2012.
Backman is playing for the AHL's Bridgeport Sound Tigers in 2012-13.