Street had surgery to repair a torn meniscus Wednesday in his native Texas.
He tweeted after the surgery:
Just got out of surgery, still pretty loopy, but the doc said I should come back throwing 98, but it could have been 89— Huston Street (@HustonStreet) August 24, 2016
The surgery puts an end to the least impressive season of Street's 12-year career. The three-time All-Star is 3-2 with a career-low nine saves and a 6.45 ERA.
Street hasn't pitched since July 31. He missed significant playing time earlier this season with an oblique muscle injury.
Street is expected to be healthy for next season. He is under contract for $9 million in 2017.
He is the sixth player to undergo season-ending surgery for the Angels (52-73), who are on pace for their worst season in 23 years.
The Associated Press contributed to this report.