At this time, head coach Peter Carrol said Harvin is seeking a second opinion to see if he needs surgery regarding a hip injury, as noted by ESPN's Chris Mortensen, which was first reported by NFL Network's Ian Rapoport:
This is an inauspicious way to start the season for what many consider to be a Super Bowl caliber team in the Seahawks.
A source close to Harvin told Mike Freeman of CBS Sports, "Everyone is holding their breath" about his injury, and it's not hard to see why, as Bleacher Report injury expert Will Carroll says the surgery is one you "don't come back from...in-season":
Losing Harvin obviously won't kill Seattle's chances of winning a championship. Even if he's not available to play in 2013, the team did well last season without him on the roster on the offensive side of the ball.
As a rookie, Russell Wilson blossomed into a premier playmaker and was one of the most exciting players to watch by the end of the season. He turned the team's passing attack into a weapon capable of burning even the best defenses, as we saw from the team's 42-13 bludgeoning of the San Francisco 49ers in Week 16.
Sidney Rice and Golden Tate proved to be a capable duo at the receiver position, and Zach Miller came on strong toward the end of the year.
Don't forget about Marshawn Lynch—one of the most productive running backs in the game. He is capable of taking over a game all by himself and will be a huge focal point of the team's offensive attack, regardless of whether or not Harvin can play this year.
Without Harvin, the Seahawks will still be able to move the ball and score, but losing him would significantly deflate the big-play potential of the Seahawks' offense this season.
One of the most explosive playmakers in the NFL, Harvin was expected to give the Seahawks an added dimension of dynamism. His ability to get open underneath would have provided Rice—a highly underrated receiver—and Tate with more one-on-one opportunities on the outside.
Running a three wide receiver set with Harvin in the slot and the tight end Miller off tackle would have given Seattle a chance to work defenses over in both passing and running situations, since teams would need to run nickel and dime packages to combat the aerial attack.
On paper, Harvin and Wilson together is a dream combination.
In addition to his ability to make game-breaking plays as a receiver, Harvin is also an accomplished runner who is a perfect partner for the mobile young signal-caller on read-option plays.
Seattle's offense with Harvin and Wilson is something that will keep defensive coordinators up at night. There are so many different ways the receiver can hurt opposing defenses, and his strengths complement what the Seahawks already had in place to perfection.
Without Harvin, the Seahawks will need to rely on the formula that worked last year. Featuring the 27th-ranked passing offense in the NFL, Seattle beat up on teams with a brutally effective running game and timely big plays in the passing game while the defense shut opposing offenses down.
Not a lot of fireworks.
Just good, old-fashioned, hard-nosed football.
Follow me on Twitter @JesseReed78