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Pittsburgh Penguins trades for 1979-80
| St. Louis Blues acquire | Date | Pittsburgh Penguins acquire | ||
|---|---|---|---|---|
 | Blair Chapman | November 13, 1979 | Bob Stewart |  |
| Montreal Canadiens acquire | Date | Pittsburgh Penguins acquire | ||
|---|---|---|---|---|
 | Denis Herron | August 30, 1979 | Rob Holland | |
| 1982 2nd round pick (#31-Jocelyn Gauvreau) | Pat Hughes | |||
| Detroit Red Wings acquire | Date | Pittsburgh Penguins acquire | ||
|---|---|---|---|---|
 | Pete Mahovlich | August 3, 1979 | Nick Libett | |
| Winnipeg Jets acquire | Date | Pittsburgh Penguins acquire | ||
|---|---|---|---|---|
 | 1980 7th round pick (#135-Mike Lauen) | June 9, 1979 | Jets promise not to claim Kim Clackson as a priority selection from its WHA franchise | |