| Date | Time | Headline |
|---|
| Tue Sep 1 2015 | 16:54 | Mattheus awarded win Monday night despite allowing run-scoring s... |
| Sat Jul 25 2015 | 02:21 | Mattheus got loss Friday night against Rockies, allowing winning... |
| Sun Jul 5 2015 | 10:54 | For second day in row, Mattheus helped turn small deficit into l... |
| Wed May 13 2015 | 14:19 | Mattheus claimed off waivers by Reds and will join team Thursday |
| Tue May 12 2015 | 17:17 | Mattheus designated for assignment by Angels on Tuesday |
| Tue May 12 2015 | 16:59 | Mattheus optioned to Triple-A Salt Lake on Tuesday |
| Fri May 8 2015 | 19:40 | Mattheus recalled from Triple-A Salt Lake on Friday |
| Sun Apr 5 2015 | 01:33 | Mattheus reassigned to Angels' minor league camp on Saturday nig... |
| Wed Jan 14 2015 | 19:19 | Mattheus has signed minor league deal with Angels |
| Thu Nov 20 2014 | 16:50 | The Nationals outrighted Mattheus off their 40-man roster Thursd... |
| Sat Sep 6 2014 | 12:52 | Mattheus recalled from Triple-A Syracuse on Saturday |
| Wed May 21 2014 | 20:19 | Nationals demote RHP Mattheus |
| Sun May 18 2014 | 11:06 | Ryan Mattheus recalled from Triple-A |
| Tue May 6 2014 | 12:06 | Nationals option RHP Mattheus to Triple-A |
| Tue Apr 29 2014 | 14:08 | Nats recall RHP Mattheus from Triple-A |
| Mon Apr 28 2014 | 21:45 | Ryan Mattheus will be called up Tuesday |
| Sun Mar 30 2014 | 12:08 | Ryan Mattheus optioned to Triple-A |
| Thu Mar 20 2014 | 16:23 | Mattheus (chest) to start year on DL |
| Wed Mar 19 2014 | 19:22 | Mattheus (chest) to see first action Thursday |
| Mon Mar 17 2014 | 17:31 | Mattheus (chest) throws to hitters |