It's the type of serious injury to a key player that the Jays have managed to avoid all season. The length of time that Jays right-hander Brandon Morrow is likely to miss as the result of his first-inning left oblique injury won't be known until at least Tuesday after the starter is examined by doctors.

The Jays lost 6-3 to the Washington Nationals in the first of three inter-league contests against the NL East leaders. For the Nats, a former Blue Jay for a day, Edwin Jackson, involved in the complicated trade for Colby Rasmus last July, clamped down on Toronto bats, allowing just three hits into the ninth inning, in front of 18,513 fans. These games used to mean more when the Nationals were the Expos.

"The bigger loss obviously took place with Brandon," Jays manager John Farrell said. "We'll get a better read on his condition after further tests are done (Tuesday), but I think at this point it's safe to say it's probably substantial in terms of what he's dealing with right now."