The St. Louis Cardinals put right-handed starter Joe Kelly on the 15-day disabled list Thursday, a day after he strained his left hamstring in a game in Milwaukee.
The team also sent right-handed reliever Keith Butler to Class AAA Memphis, and will recall rookie right-handed relievers Eric Fornataro and Joge Rondon from Memphis before the start of a four-game series in Washington Thursday evening.
Kelly is 1-1 with an 0.59 ERA in three starts. Butler had pitched in a limited role, appearing in just two of the Cardinals' 15 games played this season.
After Kelly was hurt running to first trying to beat out a bunt on Wednesday, there was hope he might miss just one start. But the timing of a 15-day stay on the disabled list indicates the injury is more serious than that.
It's not immediately clear how the player moves announced Thursday will help the Cardinals settle on a fifth starter in Kelly's absence.
The promotions of the two relievers might let eighth-inning reliever Carlos Martinez take a couple turns in the rotation, or they might be a stopgap before Kelly's turn in the rotation comes up again Tuesday.
By then, the Cardinals could make another move, summoning left-handed starter Tyler Lyons from Memphis if they choose to keep Martinez in the bullpen.
Fornataro will wear uniform No. 67; Rondon, whose first name is pronounced "hor-HEY," will wear No. 68. Both will be appearing in the majors for the first time.