Reimer was placed on waivers Sunday, per Chris Johnston of The Athletic.
Reimer posted a record of 11-8-2 with a 3.11 GAA and a .904 save percentage in 25 appearances with Detroit in the 2023-24 regular season. He signed a one-year, $1 million contract with Buffalo in the summer. Reimer will head to AHL Rochester if he clears waivers.