DETROIT — Astros reliever Brad Peacock has contracted hand, foot and mouth disease, requiring the righthander to leave the Astros and head home to Houston.

Though he was ill, Peacock was with the team during its three-game series in Boston last weekend. He reported worsening symptoms to the team’s medical staff once it landed in Detroit early Monday morning, manager A.J. Hinch said.

According to the Centers for Disease Control and Prevention, hand, foot and mouth disease is contagious and common in children under five. Often, affected people develop rashes on their feet, faces or inside their mouths.

Peacock’s is the third known case of hand, foot and mouth disease in Major League Baseball this season. Mets pitcher Noah Syndergaard and Yankees starter J.A. Happ each went to the disabled list with the illness last month. Expanded rosters in September will, for now, allow the Astros to avoid putting Peacock on the disabled list.

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Hinch was unsure how long Peacock would be away from the team. According to the CDC, most people recover in “7 to 10 days.” To keep the clubhouse somewhat clear of its contagious teammate, Peacock was kept away from the ballpark on Monday. He flew back on Tuesday.

“We deal with similar things like this all the time, maybe not to this extent,” Hinch said. “I’m not sure why this has become a thing in Major League Baseball this year. There’s a running joke inside about having to sanitize everything, but I’m not aware of any sort of precautions we’ve taken.”