Former Milwaukee Bucks assistant coach Kelvin Sampson is scheduled to interview for the Bucks head coaching job Thursday, according to a league source. The Bucks asked Houston Rockets general manager Daryl Morey for permission to interview Sampson, currently an assistant to Rockets head coach Kevin McHale. The Rockets were eliminated from the NBA playoffs on Friday night when they lost Game 6 to the top-seeded Oklahoma City Thunder. According to the source, the Philadelphia 76ers and Charlotte Bobcats also have requested permission to interview Sampson. Sampson was hired as a Bucks assistant by Scott Skiles during the 2008-'09 season and remained on the Bucks staff until joining the Rockets in 2011. He forged a strong relationship with Bucks point guard Brandon Jennings, who will be a restricted free agent this summer. Sampson has plenty of head coaching experience at the college level, heading programs at Washington State, Oklahoma and Indiana. He left Indiana after two years under the cloud of a telephone recruiting scandal, but first San Antonio's Gregg Popovich and then Skiles gave him an opportunity in the NBA. Another league source confirmed that former Seattle SuperSonics and Portland Trail Blazers coach Nate McMillan also has an interview scheduled with the Bucks this week. McMillan was fired by Portland in March 2012 and replaced by interim coach Kaleb Canales. Former Bucks coach Terry Stotts took over as the Trail Blazers' full-time coach last season. McMillan has interviewed for the vacant Detroit Pistons coaching job and is considered a leading candidate in the Motor City. McMillan has a career NBA coaching record of 478-452 (.514) in 12 seasons. The Trail Blazers qualified for the first round of the playoffs in 2009, 2010 and 2011 but did not advance in any of those seasons.