49ers the team's Friday practice there was plenty to be hopeful regarding on the injury front.

Image By- Niner Noise

The optimism quickly changed as left-handed player Trent Williams slowly left the field.

Coach of the Niners Kyle Shanahan said Williams is experiencing back spasms.

Which have put his availability for the game on Sunday in the game against Miami Dolphins.

If Williams is not able to play for the team, the 49ers are likely to go with the third year player McKivitz.

The same designation that the Niners have given Samuel who was in uniform on Friday.

Samuel was classified as being limited on Wednesday, and didn't participate on Thursday.

When you suffer from a severe bruise to your thigh, you sort of know how it's going to look.

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