2008-09: Blake Parlett skated in 68 games for Mississauga St. Michael's in his first full season with the Majors after being obtained in a mid-season trade with Windsor the previous year. Parlett had 26 assists, most among defensemen for the Majors, and scored 8 goals. He was +2 with 74 PMs as the Majors finished second in the OHL East Division. Parlett skated in 11 of 12 playoff games as the Majors reached the second round and was -3 with 2 assists and 13 PMs.
2009-10: Parlett was the leading scorer among defensemen for Mississauga St. Michael's (OHL) in his second full season with the club. Second only to forward Casey Cizikas (NYI) with 35 assists, Parlett scored 11 goals and was +13 with 108 PMs as the Majors again finished second in the East Division. He had 1 goal with 4 assists and was an even plus/minus with 18 PMs in 16 playoff games as the Majors reached the OHL semifinals.
2010-11: Parlett signed a minor-league contract with the Greenville Road Warriors (ECHL) and split his first pro season between the AHL and ECHL. He made his AHL debut with the Connecticut Whale in mid-February and played 24 regular season games for the Rangers' affiliate; he scored 2 goals with 10 assists and was +1 with 17 PMs for the Whale. Parlett played all six games in the Whale's first round playoff series with Portland and was -1 with 1 goal, 2 assists and 2 PMs. In 46 ECHL games with Greenville he scored 7 goals with 25 assists and was -3 with 40 PMs. Four of his seven goals were scored on the power play. He also skated in two ECHL playoff games for the Road Warriors and was -1 with an assist and 2 PMs. Parlett signed a two-year, entry-level contract with the Rangers in June, 2011.
2011-12: Parlett appeared in 55 games for Connecticut in his first full AHL season — battling for ice time in a veteran defense corps for the Whale. He scored 4 goals with 10 assists and was plus-three with 38 penalty minutes for the Whale. Parlett was sent to ECHL Greenville at the end of February and in 12 games with the Road Warriors he scored 1 goal with 6 assists and was plus-four with 17 penalty minutes. He had 1 assist and was minus-one with 4 penalty minutes in Greenville's three-game playoff series with the Florida Everblades.
Parlett was dealt by the New York Rangers to the Columbus Blue Jackets at the 2013 NHL trade deadline in the deal that sent Marian Gaborik to the Blue Jackets.