Cardinals starter Joe Kelly could be sidelined until June due to a hamstring injury, according to CBSSports Radio 920.
General manager John Mozeliak appeared on the station, saying Kelly hasn't progressed much since suffering the injury. Kelly last pitched in a major-league game April 16. He's been on the shelf with the issue since then. In his first three starts, Kelly posted a 0.59 ERA over 15 1/3 innings.