| Position: | Left Wing |
| Shoots: | Left |
| Height Ft: | 5 |
| Height In: | 10 |
| Weight Lb: | 190 |
| Played For: | Detroit Red Wings Michigan Stags/Baltimore Blades Cleveland Crusaders Colorado Rockies Minnesota Fighting Saints Calgary Cowboys |
| Birth Date: | June 26, 1952 |
| Birth Place: | Thunder Bay, Ontario, Canada |
| Draft: | 58th overall |
| Draft Year: | 1972 |
| Draft Team: | Detroit Red Wings |
| Career Start: | 1972 |
| Career End: | 1983 |
Daniel Patrick Gruen (born June 26, 1952) is a retired professional ice hockey player who played 49 games in the National Hockey League and 181 games in the World Hockey Association. He played with the Colorado Rockies, Detroit Red Wings, Michigan Stags, Winnipeg Jets, Cleveland Crusaders, Calgary Cowboys, and Minnesota Fighting Saints.
| Regular season | Playoffs | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Season | Team | League | GP | PIM | GP | G | A | Pts | PIM | |||||
| 1968–69 | Fort William Canadiens | TBJHL | 24 | 7 | 5 | 12 | 30 | — | — | — | — | — | ||
| 1969–70 | Fort William Canadiens | TBJHL | 23 | 11 | 16 | 27 | 66 | — | — | — | — | — | ||
| 1970–71 | Thunder Bay Vulcans | TBJHL | — | — | — | — | — | — | — | — | — | — | ||
| 1971–72 | Thunder Bay Vulcans | MNTBHL | 36 | 30 | 60 | 90 | — | — | — | — | — | — | ||
| 1972–73 | Detroit Red Wings | NHL | 2 | 0 | 0 | 0 | 0 | — | — | — | — | — | ||
| 1972–73 | Virginia Wings | AHL | 3 | 1 | 1 | 2 | 0 | — | — | — | — | — | ||
| 1972–73 | Fort Worth Wings | CHL | 68 | 35 | 45 | 80 | 194 | 4 | 4 | 1 | 5 | 9 | ||
| 1973–74 | Detroit Red Wings | NHL | 18 | 1 | 3 | 4 | 7 | — | — | — | — | — | ||
| 1973–74 | Virginia Wings | AHL | 57 | 25 | 27 | 52 | 64 | — | — | — | — | — | ||
| 1974–75 | Michigan Stags/Baltimore Blades | WHA | 34 | 10 | 16 | 26 | 73 | — | — | — | — | — | ||
| 1974–75 | Winnipeg Jets | WHA | 32 | 9 | 12 | 21 | 21 | — | — | — | — | — | ||
| 1975–76 | Cleveland Crusaders | WHA | 80 | 26 | 24 | 50 | 72 | 3 | 2 | 0 | 2 | 0 | ||
| 1976–77 | Colorado Rockies | NHL | 29 | 8 | 10 | 18 | 12 | — | — | — | — | — | ||
| 1976–77 | Minnesota Fighting Saints | WHA | 34 | 10 | 9 | 19 | 19 | — | — | — | — | — | ||
| 1976–77 | Calgary Cowboys | WHA | 1 | 1 | 0 | 1 | 0 | — | — | — | — | — | ||
| 1977–78 | Kansas City Red Wings | CHL | 30 | 15 | 20 | 35 | 40 | — | — | — | — | — | ||
| 1978–79 | Kansas City Red Wings | CHL | 65 | 19 | 27 | 46 | 82 | 4 | 0 | 3 | 3 | 0 | ||
| 1979–80 | Dayton Gems | IHL | 7 | 0 | 3 | 3 | 22 | — | — | — | — | — | ||
| 1979–80 | Muskegon Mohawks | IHL | 24 | 4 | 22 | 26 | 16 | — | — | — | — | — | ||
| 1979–80 | Hampton Aces | EHL | 32 | 12 | 9 | 21 | 20 | — | — | — | — | — | ||
| 1982–83 | Thunder Bay Twins | CASH | 36 | 17 | 48 | 65 | — | — | — | — | — | — | ||
| WHA totals | 181 | 56 | 61 | 117 | 185 | 3 | 2 | 0 | 2 | 0 | ||||
| NHL totals | 49 | 9 | 13 | 22 | 19 | — | — | — | — | — | ||||