Apparently, his fatigue wasn't a problem.
"I'm tired. I'm going to crash out early tonight and try to get some rest. But it's great," Bradley said. "I had to dig a little deep. You always get a little adrenaline when you're out there and having fun."
Boston rallied from an early 5-1 deficit, using two-run homers from Dustin Pedroia and Mike Napoli along with Bradley's solo shot to come back against the Mariners. Pedroia and Napoli homered in the third inning and Bradley gave Boston the lead in the fifth. Victorino's drive was part of a three-run eighth.
David Ortiz had four hits -- including a solo home run in the second off struggling Seattle starter Hisashi Iwakuma -- to give him 1,688 hits as a designated hitter, tying Harold Baines for the career record. Ortiz doubled twice and singled in the eighth.
"It means I'm getting old, man. You've got to play for a while to put numbers together," Ortiz said. "But I'm really thankful. I'm really glad to be able to come through for the ballclub."
Boston avoided its first four-game skid of the season thanks to a bullpen that finally stymied the Mariners.
Seattle was potent early, with Kendrys Morales hitting two homers, but couldn't solve the Red Sox bullpen. Alfredo Aceves, Craig Breslow and Andrew Bailey kept the Mariners scoreless for 4 2/3 innings after starter Allen Webster was tagged for seven earned runs in 2 1/3 innings.
"Those four innings in the middle of the game were the key to stabilizing it for us," Boston manager John Farrell said. "We fell behind early, our offense bails us out through the course of the night."
Seattle took a 5-1 lead in the second when rookie Brad Miller lined a three-run double into the right-field corner, but the lead was gone by the time the Mariners got back to the plate. Boston sent up nine batters and scored five times in the third, highlighted by two-run homers from Pedroia and Napoli, sandwiched around a double from Ortiz that missed clearing the fence by only a couple of feet.
Pedroia added an RBI single in the fourth and Bradley gave the Red Sox the lead in the fifth when he hit a hanging curveball from Blake Beavan (0-2) to right-center for his second homer. Bradley was recalled from Triple-A Pawtucket earlier in the day to help provide depth in the outfield with Jacoby Ellsbury (wrist) and Victorino (hamstring) nursing nagging injuries.
"The crowd is laughing about it because you're typically not going to see it, but it really set things up," Farrell said.
Morales' two-run shot in the first was thanks to the hustle of Raul Ibanez beating out a potential double play and extending the inning. Morales added a solo homer on the first pitch of the third inning and Seattle got an RBI triple from Michael Saunders, but the Mariners left runners at the corners in the fourth and never threatened again until the eighth.
Iwakuma lasted just three innings, the shortest start of his career, continuing a recent stretch of rough starts for the first-time All-Star. In his first 14 starts, Iwakuma was 7-1 with a 1.79 ERA, allowing 10 home runs and 22 earned runs. In his last five starts his ERA has ballooned to 6.83. He has given up 10 homers and 22 earned runs during the winless span.
"I think my pitches are catching too much of the plate the last couple of starts," Iwakuma said through a translator. "I need to work on that. We have some time to make adjustments and that's what I need to do."
Boston hit five homers in a game for the second time this season. The Red Sox season high is six against Toronto on April 7. ... Seattle scored in the final five innings on Monday and first three innings on Tuesday. The eight straight innings with a run set a club record. ... The Red Sox placed reliever Alex Wilson on the 15-day DL with a thumb injury. He returned to Boston for further examination.
Bryce Harper says he feels great heading into the season, but warns reporters that he'll "be walking right out the door" if they ask about his impending free agency.
Rays outfielder Kevin Kiermaier says he is "100 percent frustrated and very upset" by the team's decisions to part ways with Corey Dickerson and Jake Odorizzi.
Cubs star Anthony Rizzo, a 2007 graduate of Stoneman Douglas High School, said he was in Parkland to support victims and their families after last week's mass shooting, not to make a political statement.
Major League Baseball is imposing stricter limits on mound visits in an effort to speed games but decided against 20-second pitch clocks for 2018.
Cubs 1B Anthony Rizzo says "there needs to be change" following the mass shooting that took place at his high school alma mater in Parkland, Florida.
Stephen A. Smith weighs Tim Tebow's accuracy issues on the gridiron against his skills on the baseball field.