The pain, which Wilson described as feeling like a "pinch," is not in the calf area where Wilson sustained a slight tear that kept him on the disabled list for seven weeks. However, it does appear to be a result of overcompensation in his return from the injury, and has been a bother since Wilson's Minor League rehab assignments.
Wilson was in Pirates manager John Russell's initial lineup and was penciled in to bat leadoff for the first time this season. However, after Wilson felt a little more soreness than usual after running at Busch Stadium before batting practice, the decision was made to play it safe.
"You have a tear in your calf muscle, it's just not going to go away," said Wilson, who has played in four games since returning from the calf strain. "We want to make sure it doesn't last longer than a couple of days."
The discomfort, Wilson said, flares up primarily when he is pushing off while running, both side to side and up and back.
Russell said that he expects Wilson to be back in the lineup on Sunday, and would use his shortstop in a pinch-hitting situation on Saturday if needed.
"It's one of those things that we don't want to push it too hard and end up losing him for an extended period of time again," Russell said. "There's no sense pushing it."
Wilson will continue to spend extra time in the training room receiving treatment, though he is not scheduled to have any further tests done on the area of tightness.
"I'm going to do my best to get out there and not be a risk," he said. "I'm sick of watching. I've watched enough baseball games this year."
Jenifer Langosch is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.