Phillies pitcher Sean O'Sullivan surrendered two earned runs on five hits and one walk in six innings while striking out five but didn't factor into the decision in his team's 4-3, 10-inning loss to the Nationals.

O'Sullivan served up a solo home run in the top of the first inning but settled down to have a largely successful season debut, with the Nationals only managing a second run on a sacrifice fly in the fourth inning. The Phillies offense was able to take the starter off the hook for the loss by evening the score in the seventh inning.

"With [Scherzer] out there I knew if I did get into trouble I was going to have to limit it as much as I could and keep crooked numbers off the board and give our guys a shot to stay within striking distance," the righty said to Philly.com. "So I was very pleased with my ability to do that today."

O'Sullivan should find himself in a rematch with Washington starter Max Scherzer Friday, provided neither team alters the rotation this week.