Of all the reasons why the Red Sox have the best record in the American League -- a high-scoring offense, reliable starting pitching, positive chemistry in the clubhouse -- the biggest may be the impressive depth of their roster.

And rarely has that depth been tested more than last night.
Facing a four-run deficit after only two innings against Mariners co-ace Hisashi Iwakuma, and with both rookie starter Allen Webster and long reliever Alfredo Aceves knocked from the game in the third inning, the Red Sox got contributions from up and down the roster en route to an uplifting come-from-behind 11-8 victory over the Seattle Mariners in a rare slugfest at Safeco Field.
Start with the offense. The Red Sox unloaded with five homers -- solo shots by David Ortiz, freshly recalled Jackie Bradley Jr. and Shane Victorino, two-run blasts by Dustin Pedroia and Mike Napoli -- and 16 hits to overcome the early deficit against Iwakuma, who entered with a league-leading 2.60 ERA.
Then, move to the bullpen, already short-staffed after a pair of roster moves earlier in the day. But with the Red Sox needing the bullpen to record 18 outs after Aceves bowed out with what manager John Farrell characterized as "tightness in his left side," lefty Craig Breslow and Andrew Bailey came through, delivering lengthy scoreless outings in the middle innings.
"It was just a very good team win," Farrell said.
And it may have been just what the Red Sox needed for a final kick before the All-Star break, especially losing three consecutive games in an arduous start to their 10-game West Coast trip.
Bradley's day began at 7 a.m. in an airport in Allentown, Pa. Called up by the Red Sox to fill in for banged-up center fielder Jacoby Ellsbury, he crammed into a coach seat on a cross-country flight with a two-hour layover in Chicago for good measure.
Jet lag? There wasn't any time for that.
And when he came to the plate in the fifth inning, the score was tied 6-6, thanks to home runs by Pedroia and Napoli in the third against Iwakuma and Pedroia's RBI single in the fourth. Facing reliever Blake Beavan, Bradley drove a ball deep to center center for his second major league homer and ninth overall this season.
"I'm tired," Bradley said. "I'm going to crash out early tonight, try to get some rest. But it's just great. It feels good to be able to help out any way that I possibly can."

Breslow uttered the same refrain after unleashing 43 pitches, the most he has thrown in a game since 2005. Typically used in one-inning bursts late in games, Breslow was pressed into action in the fourth inning after Webster had been knocked out and Aceves was unable to continue.
"Definitely unusual," Breslow said. "I didn't really get a chance to go through my usual routine of stretching. But it worked out. I tried to keep us in the game as best we could. Ace needed to come out. When we went with Ace, I think the thought would be he would take us deeper into the game. That didn't work out, somebody needed to suck up some innings."
Breslow snapped the Mariners' streak of eight consecutive innings with at least one run, then gave way to embattled former closer Andrew Bailey, who recorded five outs, including a double play to end the seventh inning.
"Those four innings in the middle of the game were the key to stabilizing it for us," Farrell said.