Goals Against Average is goals allowed per 60 minutes by a goalie. Lower is better. Below are the top 15 NHL playoff players ranked by Playoff Goals Against Average for 1969-70.
| # | Player | Team | GAA |
|---|---|---|---|
| 1 | 1.49 | ||
| 2 | 2.00 | ||
| 3 | 2.10 | ||
| 4 | 2.23 | ||
| 5 | 3.00 | ||
| 6 | 3.15 | ||
| 7 | 3.23 | ||
| 8 | A. SmithAl Smith 23YG | 3.35 | |
| 9 | 3.39 | ||
| 10 | 4.03 | ||
| 11 | 4.15 | ||
| 12 | 4.51 | ||
| 13 | 4.67 | ||
| 14 | 4.74 | ||
| 15 | 5.34 |