| Jack Rule Jr. | |
| Fullname: | Jack D. Rule Jr. |
| Birth Date: | 13 November 1938 |
| Birth Place: | Mason City, Iowa, U.S. |
| Weight: | 180lb |
| College: | University of Iowa |
| Yearpro: | 1961 |
| Extour: | PGA Tour |
| Prowins: | 5 |
| Pgawins: | 2 |
| Masters: | CUT: 1964 |
| Usopen: | T54: 1974 |
| Open: | DNP |
| Pga: | T39: 1964 |
Jack D. Rule Jr. (born November 13, 1938) is an American professional golfer who played on the PGA Tour in the 1960s.
Rule was born in Mason City, Iowa[1] and grew up in Waterloo, Iowa. He defeated Jack Nicklaus in the 1956 U.S. Junior Amateur semi-finals but lost to Harlan Stevenson in the finals. He graduated from the University of Iowa and turned professional in 1961.[1]
Rule won twice on the PGA Tour, the 1963 St. Paul Open Invitational and the 1965 Oklahoma City Open Invitational. His best finish in a major was T39 at the 1964 PGA Championship.[2]
Rule played sparingly on the Champions Tour from 1989 to 2001, mostly in the U.S. Senior Open.
In 1993, Rule was inducted into the Iowa Golf Hall of Fame.[3]
| No. | Date | Tournament | Winning score | Margin of victory | Runner-up | |
|---|---|---|---|---|---|---|
| 1 | −22 (67-61-65-73=266) | 5 strokes |  Fred Hawkins | |||
| 2 | −5 (72-71-70-70=283) | 1 stroke | Bobby Nichols |