Michael Young came on to replace Moreland after the 26-year-old tweaked the hamstring running out what would become an inning-ending double-play ball.
"The first time I felt it was when I hit the base, I was trying to lean forward," Moreland said. "Don't really know a whole lot right now, we have the MRI scheduled ... and we'll go from there."
Manager Ron Washington said before the game that he planned to play Moreland in one of the final two games of the Padres series to spell a struggling Young. Washington said Young was more comfortable playing Wednesday to avoid two consecutive days off with an off-day Thursday, and so Moreland got the start in Tuesday's game.
After the game, Washington said that the team plans to fill in for Moreland with a combination of Young, Mike Napoli and Brandon Snyder -- in other words, pieces that are already in place.