Boston University men’s hockey coach Jack Parker will announce his retirement Monday, according to ESPN.The news comes one day after No. 19 BU wrapped up the No. 3 seed and home ice in the Hockey East quarterfinals next weekend. The Terriers will host Merrimack.Parker has been BU’s bench boss for 40 seasons, guiding the Terriers to three national championships, seven Hockey East tournament championships and 21 Beanpots.More to come as we get it.