Mattingly said it is "probably not very possible" Beckett pitches again this season.
The Dodgers placed Beckett on the disabled list on July 8 with a left hip impingement. He returned from the DL on July 22 and made three starts before being placed back on disabled list. Beckett's ERA in those three starts was 8.25.
Beckett, 34, pitched a no-hitter in May. He is 6-6 with a 2.88 ERA this season.
- Dan Gartland