| World Bowls Singles 2023 | 01/20 10:00 | 3 | Jason Banks v Greenslade, Jason | 2-0 | |
| World Bowls Singles 2023 | 01/17 10:00 | 8 | Greenslade, Jason v Mervyn King | 1.5-0.5 | |
| World Bowls - Simples 2024 | 01/08 19:30 | 7 | Greenslade, Jason v Furman, Neil | 2-0 | |
| World Bowls - Simples 2024 | 01/20 19:30 | 8 | Harlow, Greg v Greenslade, Jason | 2-1 | |
| Grand Prix Bowls | 09/27 14:30 | - | Greenslade, Jason v Mark Royal | 0-2 | |
| Grand Prix Bowls | 09/27 13:40 | - | Greenslade, Jason v Mark Royal | 0-2 | |
| Grand Prix Bowls | 09/27 10:00 | - | Perry Martin v Greenslade, Jason | 1-2 | |
| Grand Prix Bowls | 09/27 09:00 | - | Mark Royal v Greenslade, Jason | 0-2 | |
| Grand Prix Bowls | 09/27 07:00 | - | Greenslade, Jason v Perry Martin | 2-0 | |
| Grand Prix Bowls | 09/20 11:40 | - | Craig Newton v Greenslade, Jason | 2-0 | |
| Grand Prix Bowls | 09/20 10:00 | - | Greenslade, Jason v Kevin Rands | 0-2 | |
| Grand Prix Bowls | 09/20 08:00 | - | Greenslade, Jason v Craig Newton | 1-2 | |
| Grand Prix Bowls | 09/20 07:00 | - | Kevin Rands v Greenslade, Jason | 2-1 | |
| Grand Prix Bowls | 08/24 10:50 | - | Wayne Willgress v Greenslade, Jason | 2-1 | |
| Grand Prix Bowls | 08/24 09:50 | - | Greenslade, Jason v Robert Elmore | 1-2 | |
| Grand Prix Bowls | 08/24 08:00 | - | Greenslade, Jason v Wayne Willgress | 2-1 | |
| Grand Prix Bowls | 08/24 07:00 | - | Robert Elmore v Greenslade, Jason | 1.5-0.5 | |
| Grand Prix Bowls | 08/23 13:15 | - | Danny Brown v Greenslade, Jason | 0-2 | |
| Grand Prix Bowls | 08/23 12:14 | - | Danny Brown v Greenslade, Jason | 1-0 | |
| Grand Prix Bowls | 08/23 11:00 | - | Greenslade, Jason v Ashton, Sam | 2-0 | |
| Grand Prix Bowls | 08/23 09:00 | - | Greenslade, Jason v Danny Brown | 2-0 | |
| Grand Prix Bowls | 08/23 08:00 | - | Ashton, Sam v Greenslade, Jason | 1-2 | |
| Grand Prix Bowls | 08/02 13:40 | - | Greenslade, Jason v Kevin Rands | 1.5-0.5 | |
| Grand Prix Bowls | 08/02 12:15 | - | Greenslade, Jason v Strong, Penny | 2-1 | |
| Grand Prix Bowls | 08/02 09:45 | - | Kevin Rands v Greenslade, Jason | 1-2 | |
| Grand Prix Bowls | 08/02 09:00 | - | Strong, Penny v Greenslade, Jason | 0-2 | |
| Grand Prix Bowls | 08/02 07:00 | - | Greenslade, Jason v Kevin Rands | 2-0 | |
| Grand Prix Bowls | 08/02 07:00 | - | Greenslade, Jason v Danny Brown | Cancelled | |
| Grand Prix Bowls | 07/19 13:00 | - | Danny Brown v Greenslade, Jason | 1-2 | |
| Grand Prix Bowls | 07/19 10:40 | - | Danny Brown v Greenslade, Jason | 1.5-0.5 |
Jason John Greenslade (born 6 March 1970) is a Welsh international indoor and lawn bowler. After moving to Guernsey in 2022 he later represented them in competition.