The Miami Marlins placed Dominican right-hander Edinson Volquez on the 10-day disabled list with a blister on his right thumb.
The team convened right-hander Nick Wittgren of his Triple-A branch in New Orleans.
Both movements were announced Wednesday. Volquez had nine strikeouts but allowed eight innings, a personal record covering four innings and a third in a 3-1 loss to Tampa Bay on Tuesday.
The right suffered with the blister: only 41 of his 91 pitches were strikes. He became the first starter to award tickets to at least eight batters and strike at least nine with less than five innings since 1990, the Marlins said, citing information from Elias Sports Bureau.
Volquez is 0-4 with a 4.71 ERA in six starts this season.