I have noticed that offensive lineman don't get any stats for the games so my idea is let them have stat or 2 so we can see how well or how bad they are doing so we can adjust accordingly.

Those stats would be or could be:

Blocks
Pancakes
QB Hits they have given up
Rushing Yards Total
Rushing Yards Left Side of the Line
Rushing Yards Center of the line
Rushing Yards Right Side of the Line
Sacks Allowed
Sacks Yards
Tackles for Loss
Time in the Pocket for the QB
Yards Per Carry for the RBS

Sacks allowed is the only accurate and useful stat here and it's already in the game. Blocks is a reflection of how much time you spend on the field, not your actual talent level.

Wouldn't sacks allowed also be a reflection of how much time you spend on the field, or how many passes your team attempts? Maybe sacks allowed per pass play would be better?

Sacks can also be a side effect of poor play calling. Sacks are never going to tell the whole story by themselves about an offensive lineman.