The Dodgers announced that the right-hander will have arthroscopic surgery on the elbow on Monday.
The procedure, which will remove a bone spur and clean up loose bodies, will be performed by Dr. Neal ElAttrache in Los Angeles.
While the spur and bone bruise were known by the team, the loose bodies were not obvious until a CT scan was done on Thursday. All three things were within centimeters of each other.
"I thought that was encouraging for Jonathan," manager Don Mattingly said. "It kind of explains what has been going on."
Considered a minor surgery, the cleanup procedure allows six weeks as a general timetable before Broxton can begin throwing again.
However, that time frame depends on how he responds.
"It is all on the inside part of the elbow, where so many pitchers have problems," Dodgers head trainer Stan Conte said. "He's had three or four MRIs, and we have been chasing this around."
Conte said that Broxton had discomfort when throwing at maximum velocity. And when pitching off a mound on Monday, he had pain in the same place.
Sidelined since May 4, he's pitched only 12 2/3 innings in his free-agent season.
"Hopefully this will take care of the problem altogether," Conte said. "Taking care of these two things will hopefully allow him to go back and get on course."