D-backs' Weaver (elbow) to miss extended time

PHOENIX -- Arizona right-hander Luke Weaver has a mild sprain of the ulnar collateral ligament in his pitching elbow along with a mild flexor pronator strain, and the Diamondbacks expect him to be sidelined for an extended time.

Weaver was removed one batter into the sixth inning at San Francisco on Sunday. The Diamondbacks sought opinions from Dr. James Andrews and Los Angeles Dodgers head team physician Dr. Neal ElAttrache.

"It's obviously a bummer, and it stinks to ever be off the field," Weaver said. "For now, all I know is I have to some rest."

The 25-year-old is 4-3 with a 3.03 ERA in 11 starts.

Weaver and catcher Carson Kelly were acquired from St. Louis in the offseason trade for first baseman Paul Goldschmidt.