The Boston Red Sox placed left-hander Cam Booser on the 15-day injured list Wednesday because of left elbow inflammation.
In other moves, the Red Sox activated outfielder Jarren Duran, recalled left-hander Brennan Bernardino from Triple-A Worcester, optioned second baseman Enmanuel Valdez to Worcester and signed right-hander Brad Keller to a minor league contract.
Booser last pitched Tuesday, when he faced three batters without recording an out in Boston's 9-4 home win over the Texas Rangers.
Booser, 32, made his major league debut on April 19 and is 2-2 with one save and a 3.