After limiting the Rangers to two runs on eight hits over seven-plus innings in an 8-2 victory on Wednesday night, Graveman has a 2.31 ERA in seven starts dating to May 23, when he was promoted for his second stint with Oakland.
Graveman's first, spanning four starts, resulted in an 8.27 ERA.
"It's the guy we saw in Spring Training, he just needed a little break after a few starts," manager Bob Melvin said. "He went down there and made use of his time, which is good to see. He didn't go down there and hang his head.