According to Gibbons, Stewart tweaked the groin on Monday, when he threw out Baltimore's Jay Payton at home plate during a play in the eighth inning of Toronto's 4-3 loss. Gibbons doesn't believe that the left fielder is at risk of needing a trip to the disabled list.
"We're going to try to get him, hopefully, through tonight," Gibbons said on Wednesday. "We don't think it's too bad, but we want to get rid of it."
With Stewart on the bench, Gibbons made a handful of adjustments to his lineup. Utilityman Marco Scutaro, who has primarily filled in at third base with Scott Rolen on the 15-day DL with a broken right middle finger, started in place of Stewart in left field and was slotted into the eighth spot.
John McDonald started against the Rangers at third base and batted ninth. Rod Barajas started behind the plate and hit sixth, making his first game appearance since exiting Sunday's game in Texas with a minor groin injury.
Second baseman Aaron Hill remained in the lineup one day after being struck by a pitch on his left elbow. He left Tuesday's game in Baltimore in the seventh to receive treatment on his arm, but an X-ray wasn't deemed necessary. Gibbons said that Hill was feeling fine.
"Hilly's back in. He got hit, but he's OK," he said. "The doctor checked him out and didn't think he needed anything. He feels good today. It flared up on him -- it was barking -- so it made sense to get him in there to get some treatment."
Jordan Bastian is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.