| Year | W | L | Sv | Hold | IP | H | BB | SO | ER | ERA | WHIP | Rate |
| 2026 proj | 2 | 2 | 0 | 5 | 40.0 | 39 | 21 | 36 | 19 | 4.28 | 1.500 | 4.4 |
| 2025 | 0 | 3 | 1 | 5 | 34.3 | 38 | 20 | 36 | 16 | 4.19 | 1.689 | 3.0 |
| 2009 | 0 | 0 | 0 | 0 | 2.0 | 3 | 3 | 1 | 5 | 22.50 | 3.000 | -6.1 |
| 2008 | 0 | 0 | 0 | 0 | 1.0 | 1 | 0 | 0 | 0 | 0.00 | 1.000 | 0.7 |
| 2007 | 0 | 0 | 0 | 0 | 3.7 | 3 | 1 | 3 | 4 | 9.82 | 1.091 | -2.8 |
| 2006 | 0 | 0 | 0 | 0 | 4.0 | 8 | 3 | 4 | 7 | 15.75 | 2.750 | -6.6 |
| Date | News |
| 7/14/25 | Diamondbacks Option Flamethrower to Triple-A. The Arizona Diamondbacks have optioned right-handed flamethrower Juan Morillo to Triple-A Reno, the team announced Monday. It's possible this will signify a speedy return of right-hander Ryan Thompson, who went on the IL retroactive to July 5 with a scapular strain, however Thompson cannot be activated until July 20. Left-hander Jalen Beeks (low back inflammation) won't be able to return until July 24. Morillo, 26, showed some potential in his time with the Diamondbacks, but fell victim to a blowup outing in his most recent appearance July 12, allowing four earned runs in just one inning of work. Source: https://www.si.com/mlb/diamondbacks/arizona-diamon... |
| 4/23/25 | How the Diamondbacks Uncovered This Hidden Bullpen Gem. The Arizona Diamondbacks might have a hidden gem in their bullpen: flamethrowing right-hander Juan Morillo. The 26-year-old rookie found his way into his first career major league contest on Saturday, and shut the door on a D-backs win on Tuesday. It took a meltdown by relievers Bryce Jarvis and Joe Mantiply, coupled with an injury to A.J. Puk to force Arizona's hand, but Morillo was one of three relievers who got the call on April 19, and he looked ready for the lights in his first taste of MLB. Source: https://www.si.com/mlb/diamondbacks/arizona-diamon... |