On MLB 40-man: YES
Acquired: Drafted 1st Rd (34) '19
| Fri 4/25 | Sat 4/26 | Sun 4/27 |
|---|---|---|
| ATL 1-3 6 | ATL 8:10 PM EDT | ATL 4:10 PM EDT |
Positions
RP
2026 Earned Positions
RP
All Leagues
Average $1.38
Median $1.00
Old School (5x5)
Average $1.00
Median $1.00
All Leagues
Average $1.10
Median $1.00
Old School (5x5)
Average $1.40
Median $1.00
Roster%
2.45%
Change
7Day
2.75%
30Day
2.45%
2025 OPL Round 1
OPL Roster%
0.00%
OPL Average Salary
$0.00
April 20, 2025 9:17 PM : Jameson earned a save with a scoreless inning during Sunday's extra-innings win over the Cubs.
Analysis: Jameson was promoted from Triple-A Reno on Saturday and secured a save in his season debut with the Diamondbacks. It was his first MLB appearance since July 6, 2023 after missing the entire 2024 campaign while recovering from Tommy John surgery. Jameson likely won't see many save opportunities out of Arizona's bullpen, but with A.J. Puk (elbow) and Kevin Ginkel (shoulder) both currently on the shelf, the right-hander could work his way into a high-leverage role.
MLB Stats
Pitching
| Year | Team | G | GS | IP | WINS | SV | K | ERA | WHIP |
|---|---|---|---|---|---|---|---|---|---|
| 2022 | ARI | 4 | 4 | 24.1 | 3 | 0 | 24 | 1.47945 | 1.10959 |
| 2023 | ARI | 15 | 3 | 40.2 | 3 | 1 | 37 | 3.31967 | 1.42623 |
| 2025 | ARI | 2 | 0 | 2.0 | 0 | 1 | 0 | 4.50000 | 2.00000 |
MILB Stats
Pitching
| Year | Team | G | GS | IP | WINS | SV | K | ERA | WHIP |
|---|---|---|---|---|---|---|---|---|---|
| 2019 | ARI (A-) | 8 | 8 | 11.2 | 0 | 0 | 12 | 6.17143 | 1.97143 |
| 2021 | ARI (A+) | 13 | 12 | 64.1 | 2 | 0 | 77 | 3.91710 | 1.21244 |
| 2021 | ARI (AA) | 8 | 8 | 46.1 | 3 | 0 | 68 | 4.07914 | 1.20863 |
| 2022 | ARI (AA) | 4 | 4 | 18.2 | 2 | 0 | 23 | 2.41071 | 0.91071 |
| 2022 | ARI (AAA) | 22 | 21 | 114.0 | 5 | 0 | 109 | 6.94737 | 1.58772 |
| 2023 | ARI (AAA) | 5 | 5 | 28.0 | 4 | 0 | 24 | 5.78571 | 1.42857 |
| 2025 | ARI (AAA) | 7 | 0 | 6.2 | 0 | 0 | 10 | 2.70000 | 1.20000 |
Recent Games
Last 10 MLB Games
| Date | Team | Opponent | GS | Win | Save | Hold | IP | TBF | R | ER | H | K | BB | HBP | HR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 23, 2025 | ARI | TBR | 0 | 0 | 0 | 0 | 1.0 | 6 | 2 | 1 | 3 | 0 | 1 | 0 | 0 |
| Apr 20, 2025 | ARI | @CHC | 0 | 0 | 1 | 0 | 1.0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Jul 6, 2023 | ARI | NYM | 0 | 0 | 0 | 0 | 3.0 | 14 | 2 | 2 | 5 | 2 | 1 | 1 | 1 |
| Jun 29, 2023 | ARI | TBR | 0 | 0 | 0 | 0 | 3.0 | 10 | 0 | 0 | 1 | 4 | 1 | 0 | 0 |
| Jun 23, 2023 | ARI | @SFG | 0 | 0 | 0 | 0 | 2.0 | 10 | 0 | 0 | 4 | 2 | 0 | 0 | 0 |
| Jun 18, 2023 | ARI | CLE | 0 | 0 | 0 | 0 | 2.0 | 6 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| Jun 15, 2023 | ARI | PHI | 0 | 0 | 0 | 0 | 2.1 | 9 | 0 | 0 | 2 | 3 | 0 | 0 | 0 |
| Jun 12, 2023 | ARI | PHI | 0 | 1 | 0 | 0 | 2.0 | 9 | 2 | 2 | 1 | 1 | 2 | 0 | 0 |
| Jun 9, 2023 | ARI | @DET | 0 | 0 | 0 | 0 | 2.1 | 10 | 2 | 2 | 3 | 1 | 0 | 0 | 1 |
| Jun 3, 2023 | ARI | ATL | 0 | 0 | 0 | 0 | 3.1 | 14 | 2 | 2 | 5 | 1 | 1 | 0 | 1 |
| Totals | 0 | 1 | 1 | 0 | 22.0 | 90 | 10 | 9 | 24 | 15 | 6 | 1 | 3 | ||
Last 10 MILB Games
| Date | Level | Team | Opponent | GS | Win | Save | IP | TBF | R | ER | H | K | BB | HBP | HR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 17, 2025 | AAA | RNO | RR | 0 | 0 | 0 | 1.0 | 4 | 1 | 1 | 1 | 0 | 0 | 0 | 1 |
| Apr 13, 2025 | AAA | RNO | @SL | 0 | 0 | 0 | 0.2 | 2 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| Apr 10, 2025 | AAA | RNO | @SL | 0 | 0 | 0 | 1.0 | 3 | 0 | 0 | 0 | 3 | 0 | 0 | 0 |
| Apr 8, 2025 | AAA | RNO | @SL | 0 | 0 | 0 | 1.0 | 5 | 0 | 0 | 2 | 1 | 0 | 0 | 0 |
| Apr 5, 2025 | AAA | RNO | TAC | 0 | 0 | 0 | 1.0 | 4 | 0 | 0 | 1 | 1 | 0 | 0 | 0 |
| Apr 2, 2025 | AAA | RNO | TAC | 0 | 0 | 0 | 1.0 | 5 | 0 | 0 | 2 | 2 | 0 | 0 | 0 |
| Mar 28, 2025 | AAA | RNO | @LV | 0 | 0 | 0 | 1.0 | 5 | 1 | 1 | 2 | 2 | 0 | 0 | 1 |
| May 23, 2023 | AAA | RNO | @ELP | 1 | 1 | 0 | 6.0 | 29 | 5 | 5 | 9 | 4 | 2 | 0 | 0 |
| May 17, 2023 | AAA | RNO | SAC | 1 | 1 | 0 | 6.0 | 24 | 2 | 2 | 5 | 7 | 0 | 1 | 1 |
| May 11, 2023 | AAA | RNO | @TAC | 1 | 1 | 0 | 6.0 | 23 | 1 | 1 | 2 | 5 | 3 | 0 | 0 |
| Totals | 3 | 3 | 0 | 24.2 | 104 | 10 | 10 | 24 | 26 | 5 | 1 | 3 | |||
Avg Salary & Roster%
Last 30 days
2026 Position Eligibility Progress
To gain eligibility, a player must have 5 GS or 10 G at a position in the majors, or 20 G at a position in the minors.
Transaction History
| Date | Transaction Type | Team | Salary |
|---|---|---|---|
| September 27, 2022 10:42 PM | add | Hot Cheese Situation | $4 |
| October 14, 2022 2:25 AM | increase | Hot Cheese Situation | $6 |
| January 18, 2023 2:16 PM | move | Cosby Sweaters (from Hot Cheese Situation) | $6 |
| January 24, 2023 1:36 PM | cut | Cosby Sweaters | $0 |
| February 19, 2023 7:34 PM | add | Fightin’ Philly Phrenetics | $1 |
| March 13, 2023 9:24 PM | cut | Fightin’ Philly Phrenetics | $1 |
| March 22, 2023 8:32 AM | add | Inglorious Batsters | $3 |
| June 9, 2023 7:03 PM | cut | Inglorious Batsters | $2 |
| July 12, 2023 5:13 PM | add | Inglorious Batsters | $2 |
| July 13, 2023 9:27 AM | cut | Inglorious Batsters | $1 |
| August 24, 2023 12:51 PM | add | Inglorious Batsters | $1 |
| September 1, 2023 8:06 PM | move | Clogging Up The Bases (from Inglorious Batsters) | $1 |
| October 12, 2023 12:10 PM | increase | Clogging Up The Bases | $3 |
| December 24, 2023 1:33 PM | cut | Clogging Up The Bases | $0 |