[Dawgfan19]

The in-game help (offensive and defensive PDFs to be specific) provides this information re: weight and height. Refer to the PDFs to understand the weight guidance by position. Similar to many adjustments made by FOF, the performance impact of outlier players likely occurs as a small modifier to the basic result. The degree to how that happens would be speculation.

I tend to pay more attention to weight guidelines on the defense. Also, and antidotally, shorter QBs (even those who appear to be studs) seem to not perform as expected. I prefer QBs 6’ 2” or taller and won’t have a QB shorter than 6’ 0” on my roster. Jim does give us a hint that short QBs can struggle.

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In Front Office Football, a player’s performance is reduced by the difference between that player’s weight and the ideal weight for the position he is playing on that particular play.

For some positions, height matters. Quarterbacks ideally can see over the rushing defensive linemen. Height matters more for quarterbacks than for any other position, but a quarterback’s weight does not matter. Wide receivers and tight ends can better compete for thrown balls if they’re taller.

For some positions, height matters. For defensive backs, the taller you are, the more likely you’re able to successfully cover receivers. For defensive linemen – especially linemen in a 34 defense expected to handle two gaps – if you’re too short, you will have trouble seeing over offensive linemen and making a good choice as to how to handle the block.