| Date | Time | Headline |
|---|
| Thu Apr 14 2016 | 04:27 | RHP Arnold Leon designated for assignment Wednesday to make room... |
| Wed Jan 6 2016 | 03:29 | RHP Arnold Leon, designated for assignment by A's on Dec |
| Tue Dec 29 2015 | 05:32 | RHP Arnold Leon designated for assignment by A's on Monday to cl... |
| Tue Sep 1 2015 | 15:55 | Leon recalled from Triple-A Nashville on Tuesday |
| Fri Aug 14 2015 | 15:42 | Leon optioned back to Triple-A Nashville on Friday |
| Mon Aug 3 2015 | 17:43 | Leon recalled from Triple-A Nashville on Monday |
| Fri Jul 24 2015 | 17:57 | Leon optioned to Triple-A Nashville on Friday |
| Thu Jul 23 2015 | 13:23 | Leon recalled from Triple-A Nashville on Thursday |
| Fri Jun 19 2015 | 17:22 | Leon optioned to Triple-A Nashville on Friday |
| Fri Jun 12 2015 | 17:13 | Leon recalled from Triple-A Nashville |
| Wed Jun 3 2015 | 15:30 | Leon optioned to Triple-A Nashville on Wednesday |
| Wed May 20 2015 | 13:46 | Leon will pitch in relief for A's |
| Wed May 20 2015 | 10:07 | Leon recalled from Triple-A Nashville on Wednesday |
| Thu Apr 23 2015 | 13:40 | Leon optioned back to Triple-A Nashville on Thursday |
| Wed Apr 22 2015 | 15:23 | Leon called up to majors Wednesday |
| Sun Mar 15 2015 | 12:50 | Leon optioned to Triple-A Nashville on Sunday |
| Fri May 9 2014 | 09:06 | Arnold Leon optioned to Triple-A |
| Wed May 7 2014 | 12:04 | Arnold Leon recalled from Triple-A |
| Mon May 5 2014 | 18:55 | Arnold Leon to make MLB debut Wednesday |
| Mon Mar 11 2013 | 12:31 | Arnold Leon optioned |
