Jack Della Maddalena
| Jack Della Maddalena | |
|---|---|
| Born | Giacomo Della Maddalena 10 September 1996 Perth, Western Australia, Australia |
| Height | 5 ft 11 in (1.80 m) |
| Weight | 170 lb (77 kg; 12 st 2 lb) |
| Division | Welterweight (2016–present) Middleweight (2016) |
| Reach | 73 in (185 cm) |
| Fighting out of | Perth, Western Australia, Australia |
| Team | Scrappy MMA |
| Rank | Black belt in Brazilian Jiu-Jitsu under Ben Vickers |
| Years active | 2016–present |
| Mixed martial arts record | |
| Total | 21 |
| Wins | 18 |
| By knockout | 12 |
| By submission | 2 |
| By decision | 4 |
| Losses | 3 |
| By knockout | 1 |
| By submission | 1 |
| By decision | 1 |
| Other information | |
| Mixed martial arts record from Sherdog | |
Giacomo "Jack" Della Maddalena (born 10 September 1996), also known by his initials JDM, is an Australian professional mixed martial artist. He currently competes in the Welterweight division of the Ultimate Fighting Championship (UFC), where he is the former UFC Welterweight Champion. As of 18 November 2025, he is #1 in the UFC welterweight rankings and as of 17 March 2026, he is #13 in the UFC men's pound-for-pound rankings.