The St. Louis Cardinals placed left-hander Jaime Garcia on the 15-day disabled list with left shoulder pain.
Garcia will see a doctor to try to find out exactly what is wrong and how long he will be out, according to the St. Louis Post-Dispatch.
The Cardinals recalled reliever Mitchell Boggs from Class AAA Memphis to take Garcia's roster spot.
Garcia, 26, had shoulder problems last year. This year, he is 5-2 with a 3.58 ERA, 1.30 WHIP and 43 strikeouts in 55 1/3 innings. He has struggled, however, in his last two starts, allowing 11 earned runs in 11 1/3 innings.
Starter Jake Westbrook is also on the disabled list, so the Cardinals placed John Gast into the rotation.