Donato scored a goal on four shots, added an assist, went plus-2 and logged two PIM in Saturday's 6-2 preseason win over the Blues.
Donato opened the scoring in the first period and set up a Frank Nazar tally midway through the second. Over three preseason contests, Donato put up three points. The 28-year-old is versatile enough to play center or wing, but with the Blackhawks' summer spending spree on wingers, Donato's best path to consistent playing time will be as the fourth-line center.