Bobby Jenks has another procedure

Boston Red Sox relief pitcher Bobby Jenks, who had surgery at Massachusetts General Hospital in December to remove bone fragments from his lower back, underwent a second spinal decompression recently and is unlikely to be ready for the start of spring training, the team revealed on Thursday.

Jenks, 30, is in the second year of a two-year, $12 million contract. He missed much of last season due to back issues and the subsequent discovery of a pulmonary embolism, which required treatment that delayed the first surgery on his back.

The second procedure, which took place at a Phoenix-area hospital, was necessary after additional bone fragments were discovered, according to The Boston Globe, which first reported the procedure.

Jenks, who was a closer for the Chicago White Sox before coming to Boston to take on the role of setup man, isn't expected to be ready for activity until sometime in March.