| 20 | | Tumbleweed Open | C | 27-Jan to 28-Jan-1990 | |
| 29 | | 12th Annual Bud Light Wintertime Open | A | 17-Feb to 18-Feb-1990 | |
| 22 | | Riverview Open | C | 24-Feb to 25-Feb-1990 | |
| 33 | | March Monthly | C | 03-Mar-1990 | |
| 36 | | Kleinman Klassic | C | 10-Mar to 11-Mar-1990 | |
| 47 | | Fantasy Fling | C | 24-Mar to 25-Mar-1990 | |
| 36 | | Master's Cup | A | 21-Apr to 22-Apr-1990 | |
| 16 | | 7th Aquatic Park Classic | C | 29-Apr to 30-Apr-1990 | |
| 53 | | 1990 Pepsi Rocket City Super Tournament | A | 19-May to 20-May-1990 | |
| 49 | | 1990 Edgewood Electric Open | A | 02-Jun to 03-Jun-1990 | |
| 18 | | 6th Circus City Open | C | 09-Jun to 10-Jun-1990 | |
| 19 | | Checkered Flag Disc Golf Tournament | C | 16-Jun to 17-Jun-1990 | |
| 122 | | U.S. Open Flying Disc Championships | C | 25-Jun to 26-Jun-1990 | |
| 26 | 65.00 | 3 Rivers Open | C | 07-Jul to 08-Jul-1990 | |
| 59 | | Mid-America Open | A | 14-Jul to 15-Jul-1990 | |
| 18 | | Illinois State Championships - Pro/Adv | C | 22-Jul-1990 | |
| 12 | | Highland Park Open | C | 11-Aug to 12-Aug-1990 | |
| 48 | | S & H Open | C | 15-Sep to 16-Sep-1990 | |
| 23 | | Fort Fall 54 | C | 22-Sep-1990 | |
| 26 | | 5th Annual Willy Wood Classic | A | 29-Sep-1990 | |
| 135 | | 1990 PDGA Professional Disc Golf World Championships | M | 09-Oct to 13-Oct-1990 | |
| 13 | | California State Flying Disc Championships | C | 20-Oct to 21-Oct-1990 | |
