Does the quality of grass matter when sprinting?

I can only sprint on grass because I do not have access to a track. I dont have that good of grass either. There are some bumps, and it is not as flat as I want it to be. It is also winter and the grass dies, and is not green anymore. Will this be a factor in speed development?

Also my primary sport is football, so I will not need a track anyways. I am a RB.

The smoother the better but you have to go with what you have

You get faster with this unlevel surface though right?