The St. Louis Cardinals are about to lose outfielder Matt Holliday and starting pitcher Kyle McClellan to the disabled list, per MLB.com's Matthew Leach.
Holliday strained his left quadriceps on May 18th and aggravated the injury on May 22nd.
"We were aggressive," [general manager John ] Mozeliak said. "We tried. And he still wasn't getting to the point where we're comfortable with just letting him continue to go through this same pattern. So now we'll give him a few days, try to calm it down, and we're very optimistic that after 15 days, he'll be ready to go.
"Nothing's changed, and frankly it looks like it's getting better, but it's still something he feels. And rather than push it as we sit here on June 1, it just doesn't make a lot of sense. Conservative treatment we will now try, after we tried to be aggressive. It's still something that he notices, and it's just not going away."
On the season, Holliday is hitting .342 with six home runs and 31 runs batted in.
McClellan, who has a strained hip flexor, had his worst outing of the season on Monday when he allowed seven runs in four innings.
On the season, McClellan has a 6-2 record with an ERA of 3.86 and 34 strikeouts in 67 2/3 innings.
"It's definitely the right thing to do," McClellan said. "The way I've [had it] explained it's kind of like a pulled hamstring -- if you don't give it enough time, it's going to keep occurring. There's two different things -- there's the strain and there's the swelling. So you have to pretty much right now let the swelling go down and then try to strengthen everything around the strain."
To take McClellan's roster spot, the Cardinals will call right-handed pitcher Lance Lynn, who was a supplemental first-round pick in 2008, from Triple-A.
Despite pitching on Sunday against Omaha, Lynn will get the start on Thursday against San Francisco.