CHICAGO -- Bulls guard Ayo Dosunmu said he has a fracture in the back of his left shoulder and will need four to six months to recover after he has surgery Wednesday morning.

An MRI revealed a fracture that was at least a year old, according to Dosunmu. He acknowledged feeling discomfort in his shoulder for an extended period but had been able to play through it in the past.

After experiencing discomfort during a Feb. 20 game against the Knicks, Dosunmu missed the next three games. He returned to play 23 minutes Friday night against the Raptors, but said he felt a different pain than usual during the game.

"I don't remember where it started at, but I do remember having it," Dosunmu said before the Bulls' game Tuesday against the Cavs. "My shoulder goes numb and [would pop] out in the back. I do remember that numerous times, but I can't tell you the exact date.

"It was something that I played on and I think I could have continued to play on, but I don't know for what reason."

Dosunmu, 25, will be undergoing surgery for the first time and expects to be ready for the start of training camp next season, which will be the final year on a three-year, $21 million contract.

He played 46 games this season and averaged 12.3 points, 4.5 assists and 3.5 rebounds -- all career highs.

"I'm proud overall of the whole season, going out there, battling injuries and continuing to fight," Dosunmu said. "The last game, just trying to give it all I had, help the team get a win. [I] pretty much knew it would probably be my last game of the season. Just knew how I felt out there.

"I'm excited to knock this surgery out and attack rehab."