Johnson (lower body) won't play in Monday's preseason finale against Detroit, Mike Harrington of The Buffalo News reports.
Johnson is considered day-to-day. He isn't with the Sabres' main group in Czechia for the start of the 2024-25 campaign, and his injury could result in a non-roster player designation once final cuts are made. The 23-year-old blueliner registered seven assists, 35 shots on goal and 39 blocked shots in 41 regular-season appearances with the Sabres in 2023-24.