After only one year, he returned to BU as an assistant under his former college coach, Jack Kelley, and helped lead the Terriers to two consecutive national championships in 1971 and 1972.
Abbott was abruptly fired on December 21, 1973 for withholding information about the eligibility of two Canadian players who had played junior hockey in their native country, even though a judge questioned the constitutionality of the rules allegedly violated.
On April 11, 2009, Parker won his 30th NCAA tournament game and third team national title.
At the time of his retirement, he was the third-winningest coach in NCAA history, behind only Ron Mason and Jerry York.
On March 11, 2013, Parker announced that the 2012–13 season would be his last, telling BU Today, "Forty years is a long time to be at the same institution in the same job.
"[6] In 2014, Coach Parker's jersey number 6 was retired by the Terriers in a ceremony during a game against the University of New Hampshire.
Conference tournament champion Reference:[8] A list of notable players whom Parker has coached: # denotes interim athletic director