1990–91 Boston Bruins season Pittsburgh Penguins 4, Boston Bruins 2 Pittsburgh Penguins 4, Boston Bruins 2

| Date_ | Visitor | Score | Home | Record |
|---|---|---|---|---|
| May 1 | Pittsburgh Penguins | 3–6 | Boston Bruins | 1–0 |
| May 3 | Pittsburgh Penguins | 4–5 (OT) | Boston Bruins | 2–0 |
| May 5 | Boston Bruins | 1–4 | Pittsburgh Penguins | 2–1 |
| May 7 | Boston Bruins | 1–4 | Pittsburgh Penguins | 2–2 |
| May 9 | Pittsburgh Penguins | 7–2 | Boston Bruins | 2–3 |
| May 11 | Boston Bruins | 3–5 | Pittsburgh Penguins | 2–4 |