"It's a real bummer," Padres manager Bud Black stated. "It's one of those things you never like to see obviously, it's part of the game.
"This is a little bit of a blow, but our guys will respond. Our bullpen guys, I think we have five rookies, plus [Luke] Gregerson and the lefty [Alex] Hinshaw. Those guys will step up, I got a lot of faith in those young guys."
Street was on a roll. On Friday, he extended his scoreless-innings streak to 21 1/3. The last time he gave up a run was June 17 in Oakland.
Since then, rival batters have gone 3-for-66 (.045) against Street, who also walked three batters during the run for a .087 on-base percentage. He has 27 strikeouts during the streak.
Street is 21-for-21 in save opportunities this season. He has 13 saves during the streak.
"There's no real timetable other than we've got two weeks to work with it," Street said. "I know if it feels absolutely better tomorrow I can't play. It does feel a little better today."
The Padres recalled right-hander Cory Burns from Triple-A Tucson. Burns, 24, has pitched to a 1-2 record with a 3.14 ERA and three saves in 54 relief appearances for Tucson this year.