Quite possibly.  From Dylan Hernandez at the LA Times:
The news went from bad to worse for the Dodgers on Tuesday, as they put Brad Penny on the 15-day disabled list and sent Hiroki Kuroda to Los Angeles to undergo a shoulder examination similar to the one Penny had a day earlier.
Kuroda [...]

Was out at Dodger Stadium this afternoon for a meeting and saw a little early batting practice going on.  Brad Penny of all people parked a few balls deep into the outfield seats.  Juan Pierre also took a little early practice in the cage and was working on his bunting.  Other early arrivals included youngsters [...]

Tonight’s match-up of Brad Penny vs. Jake Peavy at the Ravine should be awesome.  I love it when two of the top pitchers in the National League square off against each other.  I’m sure the Dodgers aren’t that thrilled about seeing Peavy so soon, given that the Pad’s have notched W’s in his of his last six starts [...]