"We wouldn't bring him if we didn't think he was an option for us," Showalter said. "Today he feels good, good enough to pitch. He's coming. It's pretty simple this time of year, yes or no."
O'Day has posted his second consecutive impressive season, posting an identical 2.28 ERA while striking out nearly a batter per inning. And if the rest of this series is as close as Tuesday's 3-2 win, O'Day could certainly be needed.
Tommy Hunter and Brian Matusz combined to pitch the eighth inning of Tuesday's 3-2 win over the Red Sox.
Jason Mastrodonato is a reporter for MLB.com. Follow him on Twitter @jmastrodonato. This story was not subject to the approval of Major League Baseball or its clubs.