PHOENIX (AP) — The Arizona Diamondbacks placed left-hander Robbie Ray on the 10-day disabled list Monday with a strained oblique, the second starting pitcher the team has lost to injury already this season.

Right-hander Taijuan Walker is out for the season after undergoing Tommy John surgery.

Ray, an All-Star and 15-game winner last year, left with one out in the second inning of Arizona's 3-1 loss at Washington on Sunday. Diamondbacks manager Torey Lovullo said there is no timetable for his return.

Lovullo wasn't ready to say who would take Ray's next scheduled start on Friday, at home in the opener of a three-game series against World Series champion Houston.

Ray is 2-0 with a 4.88 ERA and 48 strikeouts in four starts this season.

Last season, Ray was 15-5 with a 2.89 ERA. His 218 strikeouts ranked third in the National League behind Jacob deGrom (239) and Max Scherzer (268).

To take Ray's roster spot, the Diamondbacks recalled right-handed reliever Silvino Bracho from Triple-A Reno.

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