 He was drafted by the Boston Bruins in the first round, 22nd overall, in the 2005 NHL Entry Draft.After playing three seasons in the Ontario Hockey League with the Kitchener Rangers, Lashoff made his professional debut at the end of the 2005–06 season with the Bruins' American Hockey League affiliate, the Providence Bruins.Lashoff made his NHL debut with the Boston Bruins in the 2006–07 season on October 26, 2006.