49ers' George Kittle unlikely to play vs. Seahawks, sources say

San Francisco 49ers tight end George Kittle is unlikely to play in Sunday's game against the Seattle Seahawks, according to sources.

Kittle, who has been dealing with a calf injury, did not practice on Wednesday or Thursday. He is officially listed as questionable for the game, but sources say it is unlikely that he will be able to play.

Kittle's absence would be a big blow to the 49ers' offense. He is one of the best tight ends in the NFL and is a key part of their passing game. Without him, the 49ers will be missing a key target for quarterback Jimmy Garoppolo.

The 49ers are currently 3-4 and are in need of a win to keep their playoff hopes alive. They will be facing a tough Seahawks team that is 6-1. Without Kittle, the 49ers will have a tough time moving the ball and scoring points.

The 49ers are expected to start Ross Dwelley at tight end in place of Kittle. Dwelley has been a solid contributor this season, but he is not the same caliber of player as Kittle.

The 49ers will also be without wide receiver Deebo Samuel, who is dealing with a hamstring injury. Samuel is one of the most versatile players in the NFL and his absence will also be a big blow to the 49ers' offense.

The 49ers are facing an uphill battle against the Seahawks without Kittle and Samuel. They will need to play their best game of the season to have a chance to win.