"Depends on what he tells me," De La Rosa said. "If he sees something bad, maybe we'll get a fresh MRI, then we'll make a decision on what the best thing is to do."
De La Rosa went 4-5 with a 4.26 ERA in 13 games (10 starts) this season. He made a pair of starts after coming off the DL earlier this month, but he was on a strict pitch count.
The right-hander allowed a run in two innings against the Giants on Sept. 9, then allowed a run in an inning against the Rockies on Sept. 14. De La Rosa still felt uncomfortable during that outing against Colorado, leading to the decision to not start him again for a while.
De La Rosa threw off flat ground earlier this week in San Diego, but the team was not ready to have him throw off a mound.
Jake Rill is a reporter for MLB.com based in Phoenix.