Hellickson (4-0) allowed one run and five hits en route to winning a career-best sixth consecutive decision, dating to Sept. 4. The righthander struck out six and walked two.
"Hellickson's changeup made that fastball look like it's a 100 [mph]," Boston manager Bobby Valentine said.
Tampa Bay second baseman Will Rhymes left in the eighth inning after being hit by a pitch near his right elbow. While standing at first base he gestured that he wanted to come out of the game, took a couple of steps and collapsed into the arms of first base coach George Hendrick. Trainers worked on Rhymes in the coach's box before he was assisted to a utility cart and left the field.
"He got kind of rubber-legged right there," Rays manager Joe Maddon said. "That stuff hurts. I know it's in the arm, but that can definitely take your breath away."
The Rays said Rhymes briefly fainted, but that he is fine, remained at the ballpark for X-rays on his arm and was not taken a hospital.
Indians 9, Mariners 3: Ubaldo Jimenez (4-3) overcame a shaky start to get the win and host Cleveland pounded out a season-best five doubles.
Marlins 8, Braves 4: Giancarlo Stanton hit a two-run homer and possibly saved two runs with a diving catch for visiting Miami, which moved three games over .500 for the first time this season.
Nationals 7, Pirates 4: Adam LaRoche broke open a tight game with a three-run double for his 1,000th career hit after homering for No. 999, and Gio Gonzalez (5-1) took over the NL strikeout lead from teammate Stephen Strasburg by fanning 10 in seven innings for host Washington.
Padres 4, Dodgers 2: Chase Headley homered, doubled and drove in three runs for host San Diego. -- AP