Gray, despite a two-run first inning, displayed plenty of life on his fastball and effective downward movement on his breaking pitches to earn his first win of the season.
The 31-year-old initial start on Sunday was rained out and he threw 75-pitches in a simulated game the same day.
Pawtucket rallied from it's early 3-0 hole and scored the tying run in the top of the 9th inning to send the game into extra innings. He also struck out four and walked three. One was a slow bouncer that Trevor Plouffe couldn't field at third and allowed Mookie Betts to advance from first to third.
Chris Sale has been everything the Boston Red Sox hoped for, and even more. Velazquez's first start in the majors was one to forget.
Velazquez, who played his first seven years as a pro in the Mexican League was making the start in place of Drew Pomeranz who left his last start with an injury.
A's leadoff hitter Rajai Davis had a rough night on the bases.
I've said for most of the year that I don't really understand the treatment of Ross, but it is becoming clear that the organization is much lower on the lefty than I am.
"We've been having a little trouble in the first inning", A's manager Bob Melvin said. "When you're constantly behind coming into you're first at-bat it makes everything a little bit more hard, so to be able to respond, end up taking a lead an then keep adding on, that was big".
The A's answered with three runs in the bottom of the first.
Mitch Moreland hit a solo home run in the fourth inning for Boston, which was coming off a 5-4, 13-inning victory Wednesday night at St. Louis.
Sonny Gray pitched six strong innings, and Jed Lowrie, Chad Pinder and Khris Davis each homered, lifting the Oakland Athletics to an 8-3 victory against the Boston Red Sox on Thursday night at the Oakland Coliseum. He retired nine of the final 10 men he faced, striking out six of those before departing after 103 pitches.
"When he's punching guys out, that's the sign that Sonny is Sonny", Vogt said. "He's an ace and aces go out there and punch people out".
The A's would add two runs in the sixth to take an 8-3 lead.
- Red Sox prospect Sam Travis has been tearing up the month of May hitting.368 with three home runs in 16 games.