Allen already has interviewed for the Celtics’ opening, Washburn reported.
The Blazers are looking to replace Terry Stotts, who mutually parted ways with the franchise after nine seasons and eight straight playoff appearances.
Allen, 48, is a former NBA point guard who has been an assistant with the Celtics since 2015. Boston is undergoing a coaching search after Brad Stevens replaced Danny Ainge as president of basketball operations.
Allen played for the Timberwolves, Pacers and Nuggets from 1995-97, then headed overseas before retiring in 2009. He compiled a 65-104 record as coach at Penn from 2009-15.
Along with Allen, potential Blazers candidates include ESPN analyst Jeff Van Gundy, Clippers assistant Chauncey Billups, Michigan’s Juwan Howard and Nets assistant Mike D’Antoni, per Adrian Wojnarowski of ESPN.
“Portland’s a first-class organization and will have great candidates for its head coaching job, but I’ve decided not to be one of them,” Kidd told ESPN. “Whoever they choose will have big shoes to fill from Terry.”