Greaves turned aside 31 shots in Saturday's 4-2 preseason win over the Red Wings.
The 25-year-old netminder took a shutout into the third period before getting beaten by Ben Chiarot and Michael Rasmussen, but the Blue Jackets never trailed in the contest. Greaves heads into 2026-27 with a firm hold on the No. 1 job in the Columbus crease after going 26-19-9 last season with a 2.60 GAA and .908 save percentage over 55 appearances.