Cleveland Guardians9 games
7-2his teams
His line: 9.1 IP, 10 K, 6.75 ERA
Last met Sep 3, 2024
BaseballMLBKansas City RoyalsRelief pitcher
James McArthur
Stats and careerJames McArthur is a relief pitcher for the Kansas City Royals who wears number 66.
75 MLB games72 strikeouts
Updated
About James McArthur
Born on December 11, 1996, in New Braunfels, Texas, James McArthur bats and throws right-handed and played college baseball for the Ole Miss Rebels. He made his MLB debut with the Kansas City Royals on Jun 28, 2023. McArthur has played for the Royals since 2023.
In the 2024 regular season, McArthur pitched in 57 games for the Kansas City Royals with a 4.92 ERA and 49 strikeouts in 56.2 innings. Through the 2024 season, he had a 4.84 ERA and 72 strikeouts in 80.0 innings over 75 games.
Agatha Research DeskUpdated Oct 8, 2026Season by season75
Every season, every MLB appearance of his career, newest season first.
| Season | Team | Games | Starts | IP | K | BB | ERA | WHIP |
|---|---|---|---|---|---|---|---|---|
| 2024 | KC | 57 | 0 | 56.2 | 49 | 14 | 4.92 | 1.45 |
| 2023 | KC | 18 | 2 | 23.1 | 23 | 2 | 4.63 | 0.94 |
| Career | 75 | 2 | 80.0 | 72 | 16 | 4.84 | 1.30 |
How he is doing now
2024 pitching3.65 ERA56.2 innings, 49 strikeouts, 1.31 WHIP
Royals69-932026 regular season
Last game0.2 IP, 1 K, 0 ERSep 16 vs Tigers
Injury status
No active flag. Latest report 60-Day-IL (61d ago), no longer on the injury report.
Career
1year2023 to 2024
- 2023MLB debutKansas City Royals
- 2023Best start1.0 IP, 2 K, 3 ER, vs Mariners
- 2024Best season56.2 IP, 49 K, 4.92 ERA in 57 games
- Sep 16, 2024Latest game0.2 IP, 1 K, 0 ER vs Tigers
Regular season
75 games
80.0 IP, 72 K, 4.84 ERA
MLB debut
2023 seasonKansas City Royals
Latest game
Sep 16, 2024: 0.2 IP, 1 K, 0 ERTigers 7, Royals 6
Most often against
The teams he has faced most, with his teams' record and his line against each.
Chicago White Sox7 games
6-1his teams
His line: 7.1 IP, 6 K, 0.00 ERA
Last met Jul 29, 2024
Houston Astros5 games
4-1his teams
His line: 6.2 IP, 7 K, 1.35 ERA
Last met Aug 30, 2024
Seattle Mariners5 games
2-3his teams
His line: 5.0 IP, 7 K, 10.80 ERA
Last met Jun 9, 2024
St. Louis Cardinals5 games
3-2his teams
His line: 4.2 IP, 4 K, 3.86 ERA
Last met Aug 9, 2024
Boston Red Sox4 games
0-4his teams
His line: 4.2 IP, 3 K, 0.00 ERA
Last met Aug 5, 2024
Injury history
ESPN's injury reports, newest first.
- Sep 10, 202660-Day-IL Elbow
McArthur (elbow) allowed three runs on three hits and no walks with one strikeout across two-thirds of an inning in a rehab appearance with Double-A Northwest Arkansas on Wednesday.
ESPN / KC
- Aug 21, 202660-Day-IL Elbow
McArthur is dealing with right elbow inflammation and has been placed on the 60-day injured list.
sdio / KC
- Aug 19, 202660-Day-IL Elbow
McArthur (elbow) began a throwing progression during the second half of the season and is on a bullpen schedule, per MLB.com.
ESPN / KC
- May 24, 202660-Day-IL Elbow
McArthur (elbow) underwent surgery Friday to help combat continued soreness and inflammation, MLB.com reports.
ESPN / KC
Sources and updates
Stats, scores and injury reports come from Agatha's own records: the SABR Lahman Baseball Database for the seasons through 2025, MLB's own box scores, its transactions and ESPN's injury reports.
Updated Nov 9, 2026, 6:27 AM ET. Results and form refresh after every game; biography facts are checked weekly.